建议直接用一个char[]读入
by Sun_Email @ 2023-03-01 20:22:17
(就是用%s)
by Sun_Email @ 2023-03-01 20:22:34
```cpp
#include<bits/stdc++.h>
int nl(int n){
int x=0;
if(n<0){
++x;n*=-1;
}
do{
x++;
n/=10;
}while(n!=0);
return x;
}
using namespace std;
int main(void){
int a,b,i;
char x,y[3];
scanf("%d",&i);
for(int j=1;j<=i;j++){
scanf("%s",y);
if(isalpha(y[0])){
x=y[0];
scanf("%d %d",&a,&b);
}
else{
a=0;
for(int k=0;k<strlen(y);++k){
a=a*10+(y[k]-'0');
}
scanf("%d",&b);
}
if(x=='a'){
printf("%d+%d=%d\n%d\n",a,b,a+b,nl(a)+nl(b)+nl(a+b)+2);
}
else if(x=='b'){
printf("%d-%d=%d\n%d\n",a,b,a-b,nl(a)+nl(b)+nl(a-b)+2);
}
else if(x=='c'){
printf("%d*%d=%d\n%d\n",a,b,a*b,nl(a)+nl(b)+nl(a*b)+2);
}
}
return 0;
}
```
样例过的
by Sun_Email @ 2023-03-01 20:26:41
@[UTAsriel](/user/825518)
by Sun_Email @ 2023-03-01 20:26:53
@[Sun_Email](/user/566451)
感谢大佬指教！
by UTAsriel @ 2023-03-03 15:20:31