C语言复习材料

一、选择题9、下列程序段运后变量S的值为(S=1)。IntI,s=1;For(i=1;i<=6;i++)Continue;}S=110、下列程序段的运行结果是(D)。Inta[10]={1,2,3,4,5,6,7,8,9,10};For(i=1;i<=6;i++)A[i+1]=a[i+1]+1;For(i=0;i<10;i++)Printf(“%3d”,a[i]);A、345678910910B、23456789910C、12345678910D、12456789910应是(C)。12、下列程序段的运行结果是(C)Str[2][1]=’\0’;Printf(”%s”,str);A、abcdefg0iB、abcdefg0C、abcdefgD、abcdefghi13、下列程序的运行结果是(A)。#include<>Intnum=20;Fun()Return--num;}Voidmain()Printf(“%d\n”,num);}15、若已定义：inta[3][4],*p=a;则能表示数组元素a[1][2]地址的是(C)。A、a[1][2]B、p[6]C、p+6D、*(a[1]+2)16、下列程序段的运行结果是(D)。Inta[]={1,2,3,4,5,6,7},*p=a;Intn,s=0;For(n=0;n<6;n++)s+=p[n++];Printf(“%d”,s);A、12B、15C、16D、917、下列程序的运行结果是(B)。#include<>UniondataCharc;StructIntI;Uniondatad;Voidmain(){printf(“%d\n”,sizeof(q));}18、下列程序段的执行结果是(A)。StructstudentInthigh;Intweight;Structstudent*p;IntI,sum=0;Floataver;P=a;For(i=0;i<3;i++){sum=sum+(p+i)->high;}Printf(“%f\n”,sum/;19、在对无符号数的位运算中，操作数左移两位相当于(B)。20、下列程序运行后，文件的内容是(C)。#include<>Main(){File*fp;tndIf(fp!=NULL)Fclose(fp);If(fp!=NULL)Fclose(fp);}A、2ndB、1stC、1st2ndD、2nd1st23、若定义：intx=3,y=2,k=5;则正确的表达式是(A)。A、x=y/2B、x=y+1=8-kC、x=(y++,y+k)D、k=int(x/y)%1025、下列程序段的运行结果是(B)。A、++3=4B、++k=4C、++k=5D、++k=327、设定义：floatx=,y=;语句()执行后变量x值为。A、x-=2*yB、x/=x+yC、x+=yD、x*=yA+=i;;a+=2;a++;29、下列程序段的运行结果是(B)。Inta[6]={1,2},i;For(i=2;i<=6;i++){a[i]=a[i-1]+a[i-2];}For(i=0;i<6;i++)Printf(“%3d”,a[i]);A、123456B、1235813C、123567D、12345631、下列程序段运行结果中变量b的值是(D)。Intb=3;Chars1=”action”,s2=s1;b=strcmp(s1,s2);AB、1C、3D、-134、下列程序的运行结果是(B)。Main(){chara[]=”cba”,*p;For(p=a;p<a+2;p++)Printf(“%s”,p);A、abcdccB、cbabaC、cbabaaD、cbaStructstudentIntage;Structstudents[3]={{301,18},{302,21},{303,19}};Structstudent*p=s;则表达式的值为21的是(D)。intmnkkmn行后k的值为(D)。A、14B、6C、2D、839、语句(D)符合C语言语法。tabccharcinta;floatx;doubley;则表达式c*a+x-y值的数据类型(B)A、floatB、doubleC、charD、int45、下列程序段执行后p的值是(C)。Inta[3][3]={3,2,1,3,2,1,3,2,1};For(i=0;i<3;i++)For(j=i+1;j<3;j++)P*=a[i][j];A、108B、12C、2D、1846、下列程序段的运行结果是(B)。Charstr[80];Printf(“%d”,strlen(str));A、8B、10C、117D、947、下列叙述正确的是(A)。A、#define是宏定义命令B、程序中使用带参数的宏时，参数类型要与宏定义时一致C、宏名只能包含大写字母和数字字符D、编译预处理命令行必须以分号结束48、若有下列程序段，则叙述正确的是(D)。Char*p;P=a;49、下列程序段的执行结果是(B)。Typedfunioncharname[10];floatweight;}class;StructanimalClassdog;doubleani;zoon;Classone;Printf(“%d”,sizeof(structanimal)+sizeof(Class));A、20B、30C、22D、10intI;enumcolors{red,green,blueblack};Inta[3];(C)是对以下正确语句的正确判断。A[red]=black;/*语句1*/I=green+blue;/*语句2*/Red=1;/*语句3*/51、下列程序段的运行结果是(A)。#include<>Main()Inta=3,b=5,c=8,k,n;Fclose(fp);Printf(%d%d\n“,k,n);Fclose(fp);55、若已定义:charc=’M’；则正确的赋值表达式是(A)。A、c=\0x2mB、c=c%3C、c=c+029D、c%=56、下列程序段的运行结果是(A)。Voidmain()X=y=1?;z=2?;Ifx)++z?;Elseif(?!(x-y))Z=3+z?;Elseif(y)Z++;ElseZ+=13;Printf(“%d\n”,z);A、5B、15C、8D、357、下列程序段运行后变量m的值为(A)。Inti,j,m=0;For(i=1;i<=2;i++)For(j=1;j<=3;j+=2)M=m+i+j;A、14B、10C、12D、1358、若定义二维数组a[3][3],设a[0][0]在数组中的位置为1，则a[2][1]在数组中位置应是(D)。Charstr1[20]={“university”},str2[20];则(B)语句是正确的。A、str2=str1B、printf(“%c”,str1);C、if(str1+20==str2)printf(“###\n”);D、scanf(“%s”,str2[]);60、下列程序的运行结果是()。#include<>Intfun(inta[]4[4])For(i=0;i<4;i++)Printf(“%2d”,a[i][1]);Printf(“\n”);}Main(){inta[4][4]={1,2,2,3,1,0,0,0,2,1,0,0,0,1,9,8};Fun(a);}61、下列叙述错误的是(C)。A、宏名可以用小写字母表示B、编译预处理命令行都必须以#号开始C、宏定义只能用大写字母表示D、使用预处理命令“#include<文件名>”时，编译系统只在指定的系统目录下查找该文件62、下列程序的运行结果是(A)。#include<>Voidmain(){char*p=”Chinese”,*q=p+4;Printf(“%c\n”,q[-1]);}63、下列程序段的运行结果是(B)。#include<>Voidmain()Printf(“%d\n”,a[0],x1-a[1].x1/a[2].x2);A、55B、43C、80D、4064、若有如下类型说明，则(B)是错误的叙述。TypedefstructChar*name;Intcj;}STU,*p;A、STU是一个结构体类型名B、p是一个结构体类型名65、若文本文件的内容为”University”(不包含引号)，则下列程序段的运行结果是B)。File*fp;Char*str;fgets(str,6,fp);Printf(“%s”,str);A、UniveB、UniverC、UniversiytD、Univ66、若已定义：charc=’B’;inta=8;floatx=;则表达式c%a+x的值是(D)。[已知‘A’的ASCII码的十进制值为65]67、若已定义：ints[3][4]={{1,2},{0,1},{3,4,5}};则s[2][2]的值是(B)。68、下列程序的运行结果是(B)。#include<>Fun(m)M=++I;Printf(“%d”,m);}Main()Fun(n);Printf(“%d”,m);}A、97B、79C、66D、6769、编译预处理命令的位置可以在(C)。A、主函数内B、print();语句中C、文件开头D、自定义函数内70、若已定义：int*p1,*p2;则(B)是无效的指针运算。A、P1-p2B、p1+p2C、p1<p2D、p1>p271、当文件正常关闭时，fclose()函数的返回值是(D)。A、-1B、一个非0值C、1D、072、结构化程序设计三种基本结构中，不包含(C)。A、循环结构B、顺序结构C、嵌套结构D、选择结构73、下列选项中，均为合法整型常量的是(C)。A、120B、170C、-190D、0x2h-012-018013210x120x181e302574、若定义：inta,b,c;则逗号表达式a=10,b=23,c=a+b的值为(D)。A、23B、66C、10D、3375、putchar()函数的功能是向终端输出(A)。A、单个字符B、字符串C、一串数字D、一个实型变量的值76、能对二维数组a进行正确的初始化的语句是(C)。A、inta[2][4]={{1,2},{3,4},{5,6}}B、inta[][3]={{1,2},{},{3,5,6}}C、inta[][3]={{1,2},{3,4,5}}D、inta[2][]={{1,2},,{3,0,5}}77、下列程序段执行后s的值是(B)。Intk,s=0;Inta[3][3]={11,12,13,14,15,16,17,18,19};For(k=0;k<2;k++)S+=a[k][k+1];A、45B、28C、76D、3178、下列程序的运行结果是(A)。#include<>Intfun(inta,intb)urnab}Main()intxy=2,z;Z=fun(x,y);Printf(“%d*%d=%d\n”,x,y,z);}A、15*2=30B、x*y=30C、0D、3079、若有定义StructstudentCharsex;Intage;stu1;下列叙述错误的是(B)。A、Su1是用户定义的结构体类型变量名B、structstudent是结构体类型名enumt1{a1,a2=10,a3,a4=13};Typedefunioncharname];Intage;}ustu,*uyour;下列叙述错误的是(B)。A、ustu是一个共用体类型名B、uyour是一个共用体类型名CageustuDuyour用体类型ustu的指针类型名82、若已定义：inta=7，b=6；floatm=1；则正确的表达式是(C)。83、若定义：inti=1,j=3;则表达式(++i)+(j--)的值为(B)。84、若定义：inta=1,b=2,c=3;则表达式b>=a&&(a+b)<=c的值为(C)。ifelseC言规定，else子句总是与B)。A、缩进位置相同的ifB、其之前最近的未配置ifC、其之后最近的ifD、同一行上的86、下列叙述中错误的是(D)。A、在程序中凡是以#号开始的语句都是预处理命令行B、预处理命令行都必须以#号开始C、下列是正确的宏定义：defineR45D、C程序在执行过程对预处理命令行进行处理87、若定义：intx=8,y=7；语句printf(“%d+%d=%d\n”,x,y,x+y);执行后的输出结果是D)。A、7+8=15B、8*7C、15D、8+7=1588、下列程序的运行结果是(B)。Main(){staticchara[]=”bacdefg”,b[]=”adcbehg”;Char*p=a,*q=b;IntI;For(i=0;i<=6;i++)If(*(p+i)==*(q+i))Printf(“%c”,*(q+i));}A、fdbB、cegC、gecad、aceg90、下列程序段运行后变量s的值为(C).Inta[]={1,2,3,4,5,6,7};IntI,s=1,*p;P=&a[2];For(i=0;i<4;i++)S*=*(p+i);A、210B、60C、360D、12093、下列程序段的运行结果是(D)。Chara[]=”student”;Charb[]=”work”;Strcpy(a,b);Printf(“%s%c”,a,a[5]);A、studnB、studC、workD、workn94、对于下列程序段，叙述正确的是(A)。Inta=2;Do}while(!(a!=0));TypedefstructstuCharname[20];则正确的语句是(D)。Astudd”chen”},{2,”li”}B、structstubb[2]={{1,chen},{2,li}}二、填空题#include""main()longi,sign=1;for(i=1;i<=10001;i+=2)sign=/**//**/;}pi*=/**//**/;printf("%f\n",pi);}#include""main()longi,sign=1;for(i=1;i<=10001;i+=2)/**/;sign=/**/sign/**/;}pi*=/**/4/**/;printf("%f\n",pi);}#include<>#include<>voidmain(){/**//**/printf("Inputaninteger:");scanf("%d",&x);f=/**//**/;printf("F(x)=%f\n",f);getch();}#include<>#include<>voidmain(){/**/floatf;/**/printf("Inputaninteger:");scanf("%d",&x);f=/**/(abs(x)-2)/(pow(x,2)+1);/**/;printf("F(x)=%f\n",f);getch();}#include<>#include<>intcount(/**//**/){intn;char*p=/**//**/;while(*p){if(*p=='a')n++;/**//**/;}returnn;}voidmain(){chars[255];printf("Enterastring:");gets(s);printf("Countofais:%d\n",count(s));getch();}#include<>#include<>intcount(/**/chara[]/**/){intn;char*p=/**/a/**/;while(*p){if(*p=='a')n++;/**/p++/**/;}returnn;}voidmain(){chars[255];printf("Enterastring:");gets(s);printf("Countofais:%d\n",count(s));getch();}#include<>voidmain()/**//**/;for(i=1;i<=/**//**/;i++){if((i%3==0||i%7==0)&&(i%/**//**/==3))printf("%5d",i);n++;if(n%6==0)printf("\n");}}getch();}#include<>voidmain()/**/n=0/**/;for(i=1;i<=/**/1000/**/;i++){if((i%3==0||i%7==0)&&(i%/**/10/**/==3))printf("%5d",i);n++;if(n%6==0)printf("\n");}}getch();}#include<>#include<>voidsort(inta[],intn){inti,j,k,temp;for(i=0;i<n-1;i++)for(/**/if(k!=i)a[k]=a[i];a[i]=temp;}/**/;j<n;j++)/**/)k=j;/**/;}}voidmain(){inta[]={50,25,88,32,2,65,7,64};inti,n=sizeof(a)/sizeof(int);sort(a,n);for(i=0;i<n;i++)printf("%d",a[i]);printf("\n");getch();}#include<>#include<>voidsort(inta[],intn){inti,j,k,temp;for(i=0;i<n-1;i++)for(/**/j=i+1/**/;j<n;j++)if(/**/a[k]<a[j]/**/)k=j;if(k!=i){temp=/**/a[k]/**/;a[k]=a[i];a[i]=temp;}}}voidmain(){inta[]={50,25,88,32,2,65,7,64};inti,n=sizeof(a)/sizeof(int);sort(a,n);for(i=0;i<n;i++)printf("%d",a[i]);printf("\n");getch();}#include<>#include/**//**/doublef(doublex)y=/**/return(y);}/**/;voidmain()doublexyy;printf("Pleaseinputx:");scanf("%lf",&x);y1=f(/**//**/);y2=f(sin(x));printf("\nf(x+=%.3lf",y1);printf("\nf(sinx)=%.3lf",y2);getch();}#include<>#include/**/""/**/doublef(doublex)y=/**/*(x*x)+*x+/**/;return(y);}voidmain()doublexyy;printf("Pleaseinputx:");scanf("%lf",&x);y1=f(/**/x+/**/);y2=f(sin(x));printf("\nf(x+=%.3lf",y1);printf("\nf(sinx)=%.3lf",y2);getch();}#include""#defineROW3#defineCOL4voidmain(){inta[ROW][COL]={2,11,3,5,7,24,8,9,16,10,18,66};intb[ROW][COL]={1,9,5,12,6,11,13,2,15,7,25,56};intc[/**//**/][COL],i,j;for(i=0;i<ROW;i++)for(j=0;j<COL;j++)c[i][j]=/**/for(i=0;i<ROW;i++)forjj//**//**/;j++)printf("%5d",c[i][j]);printf("\n");}getch();}#include""#defineROW3#defineCOL4voidmain(){inta[ROW][COL]={2,11,3,5,7,24,8,9,16,10,18,66};intb[ROW][COL]={1,9,5,12,6,11,13,2,15,7,25,56};intc[/**/ROW/**/][COL],i,j;for(i=0;i<ROW;i++)for(j=0;j<COL;j++)/**/c[i][j]=/**/a[i][j]-b[i][j];/**/for(i=0;i<ROW;i++){for(j=0;j</**/COL/**/;j++)printf("%5d",c[i][j]);printf("\n");}getch();}#include<>#include<>voidmain(){chars[20];inti;printf("Pleaseinputastring:");scanf(/**//**/,s);while(s[i]){s[i]=/**//**//**//**/}printf("\nTargetstring:%s\n",s);getch();}#include<>#include<>voidmain(){chars[20];inti;printf("Pleaseinputastring:");scanf(/**/"%s"/**/,s);while(s[i]){s[i]=/**/s[i]^3;/**//**/i++;/**/}printf("\nTargetstring:%s\n",s);getch();}#include<>unsignedlongfun(unsignedlongn){unsignedlongx=0;intt=0;while(n){}t=n%10;if(t%2==/**/x=/**/n=n/10;/**/)/**/+t;returnx;}voidmain(){unsignedlongn=-1;}{{}{{{unsignedlongn=-1;{printf("Pleaseinput(0<n<00):");scanf("%ld",&n);}printf("\nTheresultis:%ld\n",fun(n));getch();}#include<>#include<>doublef(double/**//**/){return(x*x*x+*x*x+*;}voidmain()atxxxdoubley,y1,y2;{printf("Inputx1,x2:");scanf("%f,%f",&x1,&x2);y1=f(x1);y2=f(x2);}while(y1*y2>=0);y=/**//**/(x);y1=f(x1);if(y*y1>0)x1=x;x2=/**//**/;}while(fabs(y)>=1e-6);printf("RootofEquationis%\n",x);getch();}#include<>#include<>doublef(double/**/x/**/){return(x*x*x+*x*x+*;}voidmain()atxxxdoubley,y1,y2;{printf("Inputx1,x2:");scanf("%f,%f",&x1,&x2);y1=f(x1);y2=f(x2);}while(y1*y2>=0);y=/**/f/**/(x);y1=f(x1);if(y*y1>0)x1=x;x2=/**/x/**/;}while(fabs(y)>=1e-6);printf("RootofEquationis%\n",x);getch();}#include<>voidmain(){intp,q,r;floatf;clrscr();printf("Pleaseinputpq:");scanf("%d%d",/**/f=*p/q;r=(int)/**/printf("\np/q=%fgetch();}#include<>voidmain()/**/);/**/%10;Thefirstdecimalplaceis:%d\n",f,r);{intp,q,r;floatf;clrscr();printf("Pleaseinputpq:");scanf("%d%d",/**/&p,&q/**/);f=*p/q;r=(int)/**/(f*10)/**/%10;printf("\np/q=%fThefirstdecimalplaceis:%d\n",f,r);getch();}#include<>voidmain(){longf=/**//**/;inti;/**/)for(i=1;i<=13;/**//**/)f=f*i;printf("\nf=%ld",f);getch();}#include<>voidmain(){longf=/**//**/;inti;for(i=1;i<=13;/**/i=i+2/**/)f=f*i;printf("\nf=%ld",f);getch();}三、改错题#include<>#include<>#include<>#include<>voidmain(){charstr1[100],t[200];inti,j;/**/i=0;/**/clrscr();strcpy(str1,"4AZ18cGe9a0z!");for(i=0;i<strlen(str1);i++){/**/if((str1[i]%2==0)&&(i%2!=0))/**/{t[j]=str1[i];}}t[j]='\0';printf("\n源字符串为:%s\n",str1);printf("\n满足条件的字符有:%s\n",t);}#include<>#include<>#include<>#include<>voidmain(){charstr1[100],t[200];inti,j;/**/j=0;/**/clrscr();strcpy(str1,"4AZ18cGe9a0z!");for(i=0;i<strlen(str1);i++){/**/if((str1[i]%2==0)&&(i%2==0))/**/{t[j]=str1[i];}}t[j]='\0';printf("\n源字符串为:%s\n",str1);printf("\n满足条件的字符有:%s\n",t);}#include<>#include<>/**/intfun();/**/{inthen,cock,chicken,n=0;clrscr();for(cock=0;cock<=50;cock+=1)for(hen=0;hen<=100;hen=hen+1){chicken=2*(100-hen-2*cock);/**/if(cock+hen+chicken=100)/**/printf("%d-->hen:%d,cock:%d,chicken:%d\n",n,hen,cock,chicken);if(n==20)getch();}}returnn;}voidmain()num=fun();getch();}#include<>#include<>/**/intfun()/**/{inthen,cock,chicken,n=0;clrscr();for(cock=0;cock<=50;cock+=1)for(hen=0;hen<=100;hen=hen+1){chicken=2*(100-hen-2*cock);/**/if(cock+hen+chicken==100)/**/printf("%d-->hen:%d,cock:%d,chicken:%d\n",n,hen,cock,chicken);if(n==20)getch();}}returnn;}voidmain()num=fun();getch();}#include<>intfun(int*x,inty)t*x;/**/x=y;/**//**/return(y);/**/}voidmain()intxyprintf("%d,%d\n",x,y);y=fun(&x,y);printf("%d,%d\n",x,y);getch();}#include<>intfun(int*x,inty)#include<>t*x;/**/*x=y;/**//**/y=t;returny;/**/}voidmain()intxyprintf("%d,%d\n",x,y);y=fun(&x,y);printf("%d,%d\n",x,y);getch();}voidmain(){/**/intn,i,bk;/**/printf("Inputanum(1-9):");scanf("%d",&n);for(i=1;i<=n;i++){for(bk=1;bk<=n;bk++)printf("");for(j=1;/**/j<=i+1/**/;j++)printf("%d",i);printf("\n");}for(i=1;i<=n;i++){for(bk=1;bk<=i;bk++)printf("");for(j=1;j<=n-i+1;j++)printf("%d",n-i+1);printf(/**/"/n"/**/);}getch();}#include<>voidmain(){/**/intn,i,j,bk;/**/printf("Inputanum(1-9):");scanf("%d",&n);for(i=1;i<=n;i++){for(bk=1;bk<=n;bk++)printf("");for(j=1;/**/j<=i/**/;j++)printf("%d",i);printf("\n");}for(i=1;i<=n;i++){for(bk=1;bk<=i;bk++)printf("");for(j=1;j<=n-i+1;j++)printf("%d",n-i+1);printf(/**/"\n"/**/);}getch();}#include<>voidmain(){/**/inta=10;num,mark;/**/charop,es;printf("InputanExpression:a");scanf("%c%c%d",&op,&es,&num);mark=0;if(es=='='){/**/swich/**/(op)a=a+num;break;case'-':a=a-num;break;case'*':a=a*num;break;case'/':if(num)a=a/num;elsemark=1;break;default:mark=1;}}mark=1;if(!mark)printf("a=%d\n",a);printf("Error!\n");getch();}#include<>voidmain(){/**/inta=10,num,mark;/**/charop,es;printf("InputanExpression:a");scanf("%c%c%d",&op,&es,&num);mark=0;if(es=='='){/**/switch/**/(op)a=a+num;break;case'-':a=a-num;break;case'*':a=a*num;break;case'/':if(num)a=a/num;elsemark=1;break;default:mark=1;}}mark=1;if(!mark)printf("a=%d\n",a);printf("Error!\n");getch();}#include<>voidmain(){/**/inti=1,n=1;/**/{if(i%3==2&&/**/i%5=3/**/)printf("%5d",i);n++;if(!(n%5))printf("\n");}}/**/while(i<1000)/**/getch();}#include<>voidmain(){/**/inti=1,n=0;/**/{if(i%3==2&&/**/i%5==3/**/)printf("%5d",i);n++;if(!(n%5))printf("\n");}}/**/while(i<1000);/**/getch();}#include<>/**/voidfun(intn)/**/{doubley=;inta=2,b=1,c,k;for(k=1;k<=n;k++){/**/y+=(Double)a/b;/**//**/a=b/**/;b=c;}returny;}voidmain(){printf("fun(5)=%lf\n",fun(5));getch();}#include<>/**/doublefun(intn)/**/{doubley=;inta=2,b=1,c,k;for(k=1;k<=n;k++){/**/y+=(double)a/b;/**/c=a;/**/a=a+b/**/;b=c;}returny;}voidmain(){printf("fun(5)=%lf\n",fun(5));getch();}#include<>voidfun(char*p,char*b)while(*p)while(i<=4&&*p){/**/b[k]=p;/**/k++;p++;}{/**/b[k++]="";/**/}}b[k]='\0';}voidmain(){chara[80],b[80];printf("Enterastring:");gets(a);printf("Theoriginalstring:");puts(a);fun(a,b);printf("\nThestringafterinsertspace:");puts(b);printf("\n");getch();}#include<>voidfun(char*p,char*b)while(*p)while(i<=4&&*p){/**/b[k]=*p;/**/k++;p++;}{/**/b[k+1]=32;/**/}}b[k]='\0';}voidmain(){chara[80],b[80];printf("Enterastring:");gets(a);printf("Theoriginalstring:");puts(a);fun(a,b);printf("\nThestringafterinsertspace:");puts(b);printf("\n");getch();}#include<>#include<>voidmain(){/**/characterstr[100];/**/intnumber,u_letter,l_letter,i;number=u_letter=l_letter=0;printf("Pleaseinputstring:");gets(str);/**/i=1;/**/while(str[i]){if(str[i]>='0'&&str[i]<='9')number++;/**/elseif(str[i]>='A'||str[i]<='M')/**/u_letter++;elseif(str[i]>='n'&&str[i]<='z')l_letter++;}printf("number=%d,u_letter=%d,l_letter=%d\n",number,u_letter,l_letter);getch();}#include<>#include<>voidmain(){/**/charstr[100];/**/intnumber,u_letter,l_letter,i;number=u_letter=l_letter=0;printf("Pleaseinputstring:");gets(str);/**/i=0;/**/while(str[i]){if(str[i]>='0'&&str[i]<='9')number++;/**/elseif(str[i]>='A'&&str[i]<='M')/**/u_letter++;elseif(str[i]>='n'&&str[i]<='z')l_letter++;}printf("number=%d,u_letter=%d,l_letter=%d\n",number,u_letter,l_letter);getch();}#include<>#include<>voidmain(){chars[20]="international51",t[20];chartab[5][2]={{'c','h'},{'i','a'},{'a','b'},{'e','g'},{'l','p'}};inti,j=0;/**/strcmp(t,s);/**/while(t[j]){for(i=0;/**/i<=3/**/;i++)if(t[j]==tab[i][0]){/**/t[j]=tab[i];/**/break;}}printf("\nThesourestring:%s\n",s);printf("\nThetargetstring:%s\n",t);getch();}#include<>#include<>voidmain(){chars[20]="international51",t[20];chartab[5][2]={{'c','h'},{'i','a'},{'a','b'},{'e','g'},{'l','p'}};inti,j=0;/**/strcpy(t,s);/**/while(t[j]){for(i=0;/**/i<=4/**/;i++)if(t[j]==tab[i][0]){/**/t[j]=tab[i][1];/**/break;}}printf("\nThesourestring:%s\n",s);printf("\nThetargetstring:%s\n",t);getch();}#include<>voidmain()intr,m,n,p,q;printf("Enterm,n:");scanf("%d,%d",&m,&n);p=m;q=n;/**/r=m/n;/**/while(/**/r==0/**/)n=r;r=m%n;}printf("gcd(%d,%d)=%d\n",p,q,n);getch();}#include<>voidmain()intr,m,n,p,q;printf("Enterm,n:");scanf("%d,%d",&m,&n);p=m;q=n;/**/r=n%m;/**/while(/**/r!=0/**/)n=r;r=m%n;}printf("gcd(%d,%d)=%d\n",p,q,n);getch();}#include<>voidmain()printf("a,b=");scanf("%d,%d",&a,&b);a=b;/**/temp=b;/**/}while(--a>b){if(/**/(a%2)/**/)printf("%5d",a);}getch();}#include<>voidmain()printf("a,b=");scanf("%d,%d",&a,&b);a=b;/**/b=temp;/**/}while(--a>b){if(/**/(a%2)==0/**/)printf("%5d",a);}getch();}四、编程题#include<>#include<>doublefun1(doublex){doubley=;/**/y=(1+sin(x)+exp(x))/(1+x);/**/returny;}screen(){doublex;clrscr();printf("fun1=%\n",fun1);printf("fun1=%\n",fun1)