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  1. #include <iostream>
  2. #include <string.h>
  3. #include <cstdio>
  4. using namespace std;
  5.  
  6. void rep(char *str,char *fstr,char *rstr)
  7. {
  8.     int i,j,k,n,x,y=0,cnt=0;
  9.     char sss[50];
  10.     memset(sss, 0, 50);
  11.     n=strlen(fstr);
  12.     x=strlen(rstr);
  13.     for(i=0;str[i]!='\0';i++) {
  14.         if(str[i]==fstr[0]) {
  15.                 k=1;
  16.                 j=i+1;
  17.             while(j<i+n) {
  18.                  if(str[j]==fstr[k]) {
  19.                     j++;
  20.                     k++;
  21.                  }
  22.                  else break;
  23.             }
  24.             if(j==i+n) {
  25.                strcat(sss,rstr);
  26.                cnt++;
  27.                i=j-1;
  28.                y=j+(x-n)*cnt-1;
  29.             }
  30.         }
  31.         else sss[y]=str[i];
  32.         y++;
  33.     }
  34.  
  35.     sss[y]='\0';
  36.     strcpy(str,sss);
  37. }
  38. int main()
  39. {
  40.     char str[50]="iffordowhileelsewhilebreak";
  41.     char fstr[10]="while";
  42.     char rstr[10]="struct";
  43.     /*gets(str);
  44.     gets(fstr);
  45.     gets(rstr);*/
  46.     rep(str,fstr,rstr);
  47.     cout<<str<<endl;
  48.     return 0;
  49. }
  50.  
Success #stdin #stdout 0s 4256KB
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iffordostructelsestructbreak
https://ideone.com/LfYSkP
language:
C++ (gcc 8.3)
created:
5 years ago
visibility:
public

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