字符串与文件.doc

字符串与文件/*#includemain() char ch; int i=0,j=0,k=0; while(ch=getchar()!=n) if(ch=a&ch=0&ch=9)j+;else k+; printf(%d,%d,%d,i,j,k);*/*#include#includemain() FILE *fp; int ch; int i,j,k,a100; int prime(); int n; int *p; scanf(%d,&n); prime(n);for(i=3;i100;i+)ai=i; for(i=3;i100;i+) for(j=2;jk;j+)if(ai%j=0)ai=0;if(ai!=0)printf(%d,ai);if(fp=fopen(file.dat,wb)=NULL)printf(have not file strike any key to exit);getch();exit(1);for(i=3;i100;i+) if(ai!=0) *p=ai; /while(*p!=EOF)for(i=3;i100;i+) if(ai!=0) /*p=ai; /fputs(*p,fp); fputc(ai,fp); /fputs(*p,fp);/*p+=getchar();/ /ch=aiint prime(int n)int i,k;k=sqrt(n);for(i=2;ik;i+)if(n%2=0)return 0;else return 1;if(n)printf(%dn,n);*/*#include#includemain()num(int m,int k,int xx) int i,j,k;int flag=0;for(mi;im+50;i+) k=(int)sqrt(m+1); for(j=2;jk;j+) if(m%j=0) flag=0; if(flag)*/*#includeint isprime(int m) int i;for(i=2;im;i+) if(m%i=0) return 0; return 1;void num(int m,int k,int xx)int data=m+1;int half,n=0;i;while(1)half=data/2;for(i=2;ihalf)xxn+=data;if(n=k)break;data+;void num(int m,int k,int xx)int i,j,s=0;for(i=m+1;k0;i+)for(j=2;j0;n+) for(i=2;i0;m+)if(isprime(m)xxi+=m;k-;void num(int m,int n,int xx)int i=0;/k=n;for(m=m+1;n0;m+)if(isprime(m)xxi+=m;n-;main() void readwritedata();int m,n,xx1000;clrcr();scanf(%d,%d,&m,&n);num(m,n,xx);for(m=0;mn;m+)printf(%d,xxm);readwritedate();void readwritedata()int m,n,xx1000,i;FILE *rf,*wf;rf=fopen(in.dat,r);wf=fopen(in.dat,w);for(i=0;i10;i+) fscanf(rf,%d %d,&m,&n);for(m=0;mn;m+)fprintf(wf,%d,xxm);fprintf(wf,n);fclose(rf);fclose(wf);void readwrite()int m,n,xx1000,i;FILE *rf,*rw;rf=fopen(in.dat,rb);wf=fopen(in.dat,wb);for(i=0;i10;i+)fscanf(rf,%d %d,&m,&n);for(m=0;mn;m+)fprintf(wf,%d,xxm);void num(int m,int n,int xx) int i=0,j;int data;data=m+1;for(j=0;jn;j+) if(isprime(data) xxi+=data; data+;int isprime(int m) int i;for(i=2;im;i+)if(m%i=0)return 0; return 1;void num(int n,int m,int xx)int i,k=0,j=0;int half;half=n/2;while(1)for(i=2;i=m)break;*/*#includemain()int i,n=0;char a5;printf(input a four integer:n);for(i=0;ai-1!=n;i+) scanf(%c,&ai); n+;for(i=n;i=0;i-) printf(%c,ai);printf(n);*/*#includemain()int i,j;int max,min;int a10=1,2,3,4,5,6,7,8,9,0;for(i=0;i9;i+)/次数for(j=0;jaj+1)int temp;temp=aj;aj=aj+1;aj+1=temp;max=a9;min=a0;printf(%d,%dn,max,min);*/*#includemain() int fact();int n;int sum;scanf(%d,&n); sum=fact(n);printf(%dn,sum);int fact(int n) int sum;if(n=1)return 1;elsesum=n*fact(n-1);return sum;*/*#includemain()FILE *fp;char ch;if(fp=fopen(abc.txt,wt+)=NULL)printf(error have not file );getch();exit(1);ch=getchar();while(ch!=n)fputc(ch,fp);ch=getchar();rewind(fp);ch=fgetc(fp);while(ch!=EOF)putchar(ch);ch=fgetc(fp);fclose(fp);*/*#include#includemain() void fun(); int k,n,i,j; char a20=hellollo world!; scanf(%d %d,&k,&n); fun(a,k,n); /j=strlen(a); /for(i=0;ij;i+) printf(%s,a); printf(n);void fun(char a,int k,int n) int i;int j;n=3;/for(i=k;ik+n;i+)/ai=ai+n;/ai=0;j=strlen(a);/aj=0;for(i=k+n;ij;i+)ak+=ai;ak=0; */*#include#includemain() void fun();char a20=hellollo world!;int k,n;scanf(%d %d,&k,&n);fun(a,k,n);printf(%s,a);void fun(int a,int k,int n)int i,j;j=strlen(a);for(i=k+n;ij;i+)ak+=ai;ak=0;*/*#include#includemain() void fun();char s50=jkdsl;fun(s);printf(%sn,s);void fun(char *s) int i,j,a1; a0=s0; j=strlen(s); for(i=0;ij;i+) si=si+1; printf(%d=,j); sj-1=a0; sj=0;#include#includefun(char *s)char c=*s;for(;*(s+1);s+)*s=*(s+1);*s=c;*(s+1)=0;*/*#include#includemain() void fun();char a100=jksald;char b50=kalgk;fun(a,b);printf(%sn,a);void fun(char *s,char *p)int i,j;int m,n;i=strlen(s);j=strlen(p);/printf(%d,%d,i,j);for(m=0;mj;m+)si+=pm; si+j=0;*/#includemain)() FILE *in,*out; char ch,infile10,outfi