求助！！！新手c语言写不动了，想让大佬帮我看看代码

//如何输入:
//如何实现:
#include<string.h>
#include <stdio.h>
int main()
{   char x;//用于储存运算类型 
    int n,a,b;
    scanf("%d",&n);
    getchar();
    char s[10],tem[100];
    for(int i=0;i<n;i++){           
        scanf("%c",&s[0]);          
        if(s[0]<='c'&&s[0]>='a'){           
            scanf("%d%d",&a,&b);
            x=s[0];
        }else{
            sscanf(s,"%d",a);
            scanf("%d",&b);
        }
        sprintf(tem,"%d+%d=%d",a,b,a+b);
        if(x=='a'){
            printf("%d+%d=%d\n",a,b,a+b);
            printf("%d\n",strlen(tem));
        } else if(x=='b'){
            printf("%d-%d=%d\n",a,b,a-b);
            printf("%d\n",strlen(tem));
        }else if(x=='c'){
            printf("%d*%d=%d\n",a,b,a*b);
            printf("%d\n",strlen(tem));
        }

    }
    return 0;
}