#include<bits/stdc++.h>

using namespace std;

int main()
{
	char a[1000],b[1000],s;
	int n,num1,num2,num3;
	cin>>n;
	while(!(n--))
	{
		fgets(a,sizeof(a),stdin); 
		if(a[0]=='a'||a[0]=='b'||a[0]=='c')
		{
			s=a[0];
			a[0]='';
		}
		sscanf(a,"%d,%d"&num1,&num2);
		if(s='a')
		{
			sprintf(b,"%d+%d=%d"num1,num2,num3) 
		}
		if(s='b')
		{
			sprintf(b,"%d-%d=%d"num1,num2,num3) 
		}
		if(s='c')
		{
			sprintf(b,"%d*%d=%d"num1,num2,num3) 
		}
		printf("%s\n%d\n"b,strlen(b))
	}
	
}

16 9 C:\Users\JS\Desktop\口算.cpp

[Error] empty character constant