func_code_string: #include <bits/stdc++.h>   int compare(char *s, char *t, int l) {     int i;     for (i = 0; i < l; i++) {       char a = toupper(s[i]), b = toupper(t[i]);       if (a != b) return a - b;     }     return 0;   }   int main() {     static char ss[100][100 + 1], cc[100 + 1], lucky[100];     static int ll[100];     int n, m, i, j;     char c, c_, a, a_;     scanf( %d , &n);     for (i = 0; i < n; i++) {       scanf( %s , ss[i]);       ll[i] = strlen(ss[i]);     }     scanf( %s n%c , cc, &c), m = strlen(cc);     c_ = toupper(c);     a = c ==  a  ?  b  :  a ;     a_ = toupper(a);     for (j = 0; j < m; j++)       for (i = 0; i < n; i++)         if (m - j >= ll[i] && compare(cc + j, ss[i], ll[i]) == 0)           memset(lucky + j, 1, ll[i]);     for (j = 0; j < m; j++)       if (lucky[j]) {         if (tolower(cc[j]) == c)           cc[j] = isupper(cc[j]) ? a_ : a;         else           cc[j] = isupper(cc[j]) ? c_ : c;       }     printf( %s n , cc);     return 0;   }   