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;
}