#include <stdio.h>
#include <string.h>
int main()
{
    int n,total = 0;
    char a[4] = {'A','B','C','D'};
    for(int i = 0;i < 4;i++)
    {
        if(strcmp('A',a[i]) == 0)
            total += 4;
        else if(strcmp('B',a[i]) == 0)
            total += 3;
        else if(strcmp('C',a[i]) == 0)
            total += 2;
        else if(strcmp('D',a[i]) == 0)
            total += 1;        
    }
    printf("%d",total);
    return 0;
}

strcmp是字符串比较
字符比较直接比就可以

好的，谢谢！

脗潞脙茠脗碌脙鈥灻偮Ｃ偮?兟惷偮幻兟惷偮幻偮Ｃ偮

strcmp常规用法：
char *s1="Hello, Programmers!";
char *s2="Hello, programmers!";
......
r=strcmp(s1,s2);