c语言程序代码

Thisisacprogram.程序：#include<>intmain(){printf("thisisacprogram.\n”);:return0;}求两个整数之和。程序：#include〈〉intmain(){inta,b,sum;a=122;b=234;sum=a+b;printf("sumis%d\n”,sum);:return0;}求两个整数之间的较大者。程序:#include<>intmain(){intmax(intx,inty);inta,b,c;scanf("%d,%d〃，&a,&b);c=max(a,b);printf("max=%d\n",c);return0;}intmax(intx,inty){intz;if(x>y)z二x;elsez二y;return(z);}有人用温度计测量出华氏发表示的温度(如69°F),今要求把她转换成以摄氏法表示的温度(如20°C)。公式：c二5(f-32)/9.其中f代表华氏温度，c代表摄氏温度。程序：SincludeOintmain(){floatf,c;f二；c二9)*(f-32);printf \nc=%f\n，z,f,c);return0;}计算存款利息。有1000元，想存一年。有一下三种方法可选:(1)活期：年利率为rl；(2)一年定期：年利率为r2；(3)存两次半年定期：年利率为r3o分别计算一年后按三种方法所得到的本息和。程序：SincludeOintmain(){floatp0=1000,rl=,r2二，r3=,pl,p2,p3;pl=p0*(l+rl);p2二p0*(l+r2);p3二p0*(l+r3/2)*(l+r3/2);printf(z，pl=%f\np2=%f\np3=%f\n，z,pl,p2,p3);:return0;给定一个大写字母，要求以小写字母输岀。程序：SincludeOintmain(){charcl,c2;cl二'A';c2二cl+32;printf("%c\n",c2);printf("%d\n",c2);return0;}给岀三角形的三边长，求三角形的面积。公式：若给定三角形的三边长，且任意两边之长大于第三边。贝归area二Js(s-a)(s-b)(s-c.)其中s二(a+b+C)/2.程序：SincludeOSincludeOintmain()doublea,b,c,area;a=；b二；c二；s二(a+b+c)/2;area=sqrt(s*(s~a)*(s~b)*(s~c));printf("g=%f\tb=%f\tc=%f\n”,a,b,c);printf(“area=%f\n”,area);return0;}求ax'+bx+c二0方程的根。a,b,c由键盘输入，设b2~4ac>0.程序：#include<>#include<>intmain(){doublea,b,c,disc,xl,x2,p,q;scanf(“％lf%lf%lf”，&a,&b,&c);disc=b*b-4*&*c;辻(disc<0)printf(“Thisquestionhasnorealroots\n”);else{p二一b/*&);q=sqrt(disc)/*a);xl二p+q;x2二p-q;printf(“xl=%\nx2=%\n”,xl,x2);}return0;}先后输岀BOY三个字符。程序：#include<>intmain(){char&二'B',b二'O',c二'Y';putchar(a);putchar(b);putchar(c);putchar("\n');return0;用三个getchar函数先后向计算机输入BOY三个字符，然后用putchar函数输出。程序：#include<>intmain(){chara,b,c;a=getchar();b=getchar();c=getchar();putchar(a);putchar(b);putchar(c);putchar('\n‘);return0:}或#include<>intmain()putchar(getchar());putchar(getchar());putchar(getchar());putchar('\n‘)；:return0:}用getchar函数从键盘读入一个大写字母，把它转换成小写字母，然后用getchar函数输出对应的小写字母。程序：#include〈〉intmain(){charcl,c2;cl二getchar();c2二cl+32;putchar(c2);putchar('\n‘)；:return0:}输入两个实数，按代数值由小到大的顺序输出这两个数。(参照将两个杯子中的水互换，必须借助第三个杯子)。程序：#include<>intmain()floata,b,t;scanf(“％f,%f”,&a,&b);辻(a>b){tpa=b;b二t;}printf(“％,%\n",a,b);return0:}输入a,b,c三个数，要求由小到大的顺序输出。程序：SincludeOintmain()floata,b,c,t;scanf(〃％f,%f,%f〃，&a,&b,&c);辻(a>b):t-a;a=b;b二t;}辻(a>c){t-a；d二c;c二t;}辻(b>c){t二b;b二c;c二t;}printf("%,%,%\n：a,b,c);return0;14•输入一个字符，判断它是否为大写字母，如果是，将它转换成小写字母，如果不是，不转换。然后输岀最后得到的字符。程序：SincludeOintmain(){charch;scanf(“％c",&ch);ch二(ch〉二'A'&&ch〈二'Z')?(ch+32):ch;printf("%c\n",ch);return0;}或SincludeOintmain(){charch;scanf(〃%c〃,&ch);if(ch〉二'A'&&ch〈二'Z，)printf(z，%c\n，z,ch+32);elseprintf("%c\n",ch);retui'n0;

'-1'-115.有一个函数:y二(x<0)(x=0)(x>0)编一程序。输入一个x的值，要求输出相应的y值。程序：#include<>intmain()intx,y;scanf("%d",&x);if(x<0)y二T；elseif(x=0)y二0;elsey二1；printf("x=%d\ny=%d\rT,x,y);return0;}要求按照考试成绩的等级输岀百分制分数段，A等为85分以上，B等为70-84分。C等为60-69分，D等为60分以下。成绩的等级由键盘输入。程序:#include<>intmain(){chargrade;scanf("%c"，grade);printf(，zYouscore:\nz，);switch(grade){case'A':printf("85=100\n"):break;case'B':printf("70=84\rT);break;case'C':printf(〃60=69\rT);break;case'D':printf("〈60\n");break;defauIt：printf(〃enterdateerroiArT);}:return0;}写一程序，判断某一年是否为闰年。程序：ttincludeOintmain()intleap,year;printf("pleaseenteryear：");scanf("%d",&year);辻(year%4==0){if(year%100二二0){if(year%400=0)leap二1;elseleap=0;}elseleap=l;}elseleap=0;if(leap)printf(“％disaleapyear\n，z,year);printf(“％disnotaleapyear\rT，year);return0;}J或SincludeOintmain(){intleap,year;printf("pleaseenteryear:，z);scanf("%d",&year);辻(year%4!=0)leap=0;else辻(year%100!二0)leap二1;else辻(year%400!二0)leap=0;elseleap二1;if(leap==l)printf(〃％disaleapyear\nz，,year);printf("%disnotaleapyear\rT，year);retrnm0;或SincludeOintmain(){intleap,year;printf("pleaseenteryear:，z);scanf("%d",&year);辻((\?-ear%4==0&&year%100!=0)|(year%400==0))leap二1;elseleap=0;if(leap==l)printf(“％disaleapyear\nz，,year);elseprintf(“％disnotaleapyear\rT，year);retinm0;}求ax2+bx+c=0方程的根。a,b,c由键盘输入。(完整版)程序：#include<>#include<>intmain(){doublea,b,c,disc,xl,x2,x3,realpart，imagepart;scanf(〃％lf,%lf,%lf〃，&a,&b,&c);printf(z，Theequation");if(fabs(a)〈二le-6)printf(〃isnotaquadratic");else{disc二b*b-4*a*c;if(fabs(disc)〈二le-6)printf("hastwoequalroots%\rT,-b/2*a);elseif(disc>le~6){printf("hastwodistinctrealroots\n%,%”,xl,x2);xl二(-b+sqtt(disc))/2*a;x2二(~b-sqrt(disc))/2*a;realpart二-b/2*a;imagepart二sqrt(-disc)/2*a;printf("hastwocomplex:roots:\rT);printf(“％+%\n〃，realpart，imagepatt);printf(“%%\nz/,realpart,imagepart);return0;}给岀一个不多出5位的正整数，要求：（1） ：求出它是几位数；（2） ：分别输岀每一位数字；（3） ：按逆序输出各位数字，例如原数为321,输岀123。程序：SincludeOintmain（）{intnum,indiv,ten,hundred,thousand,ten_thousand,place;printf("请输入一个正整数(0=99999):“);scanf("%d",&num);辻(num>9999)place二5;elseif(num>999)place二4;elseif(num>99)place二3;elseif(num>9)place二2;elseplace二1;printfC位数为:%d\nzz,place);ten_thousand=num/10000;thousand=(num-ten_thousand*10000)/1000;hundred二(num-ten_thousand*10000-thousand*1000)/100;ten二(num-ten_thousand*10000~thousand*1000-hundred*100)/10;indiv二(num-ten_thousand*10000~thousand*1000-hundred*100-ten*10);printf（/z每一个数字分别为：〃）；printf（"%d,%d,%d,%d,%d\n",ten_thousand,thousand,hundred,ten,indiv）;switch（place）{case 5:printf（“反序数字为:%d%d%d%d%d\n",indiv,ten,