题解 | #牛牛的替换#

#include <stdio.h>

void TakePlaceChar(char* CH, int N, int A, int B, int C, int D);    //字符替换函数
int main()
{
    int n = 0;
    char a1, a2, a3, a4;
    scanf("%d %c %c %c %c",&n, &a1, &a2, &a3, &a4); //字符串长度以及四个字符
    
    char ch[n]; //字符数组
    scanf("%s",ch); //字符串
    TakePlaceChar(ch, n, a1, a2, a3, a4);

    return 0;
}
void TakePlaceChar(char* CH, int N, int A, int B, int C, int D)
{
    for(int i = 0; i < N; i++)  //遍历数组各个元素
    {
        if(CH[i] == A)  //A替换成B
            CH[i] = B;
        else if(CH[i] == C) //C替换成D
            CH[i] = D;

        printf("%c",CH[i]); //打印
    }
}