题解 | 字符串操作

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main() {
    int n, m;
    scanf("%d %d",&n,&m);
    char* str = (char*)malloc(sizeof(char)*(n+1));
    scanf("%s",str);
    for(int i = 0; i < m; i++){
        int l, r;
        char ch1, ch2;
        scanf("%d %d",&l, &r);
        scanf(" %c %c", &ch1, &ch2);
        while(l <= r){
            if(str[l-1] == ch1)
                str[l-1] = ch2;
            l++;
        }
    } 
    puts(str);
    return 0;
}

复试3