代码如下

#include <stdio.h>
#include <string.h>

int main(){
	char list[50][20010];
	int a=0, aLen=0, b=0, bLen=0, c, cLen=0, flag=0, n;
	int i, j;
	scanf("%d", &n);
	for(i=0;i<n;i++){
		getchar();
		getchar();
		gets(list[i]);
	}
	for(i=0;i<n;i++){
		if(list[i][0] >= 'a'){
			flag = list[i][0]-'a';
			j=2;
		}
		else{
			j=0;
		}
		a = b = aLen = bLen = cLen = 0;
		for(;list[i][j]!=' ';j++){
			a *= 10;
			a += list[i][j] - '0';
			aLen++;
		}
		j++;
		for(;list[i][j]!='\0';j++){
			b *= 10;
			b += list[i][j] - '0';
			bLen++;
		}
		switch(flag){
			case 0:
				c = a+b;
				printf("%d+%d=%d\n", a, b, c);
				
			break;
			case 1:
				c = a-b;
				printf("%d-%d=%d\n", a, b, c);
			break;
			case 2:
				c = a*b;
				printf("%d*%d=%d\n", a, b, c);
			break;
		}
		if(c < 0)
			cLen++;
		do{
			c /= 10;
			cLen++;
		}while(c);
		printf("%d\n", aLen+bLen+cLen+2);
	}
	return 0;
}