P1957 口算练习题

XieXiangLa @ 2023-07-16 11:05:01

#include<bits/stdc++.h>
using namespace std;
string py;
int main() {
    int n;
    cin>>n;
    string s1, s2, s3;
    for(int i=0; i<2*n; i++) {
        cin>>s1;
        if(s1=="a") {
            py="+";
            cin>>s2>>s3;
            int sum=stoi(s2)+stoi(s3);
            string s4=to_string(sum);
            string ss=s2+"+"+s3+"="+s4;
            printf("%d+%d=%d\n%d\n", stoi(s2), stoi(s3), sum, ss.size());
        } else if(s1=="c") {
            py="*";
            cin>>s2>>s3;
            int sum=stoi(s2)*stoi(s3);
            string s4=to_string(sum);
            string ss=s2+"*"+s3+"="+s4;
            printf("%d*%d=%d\n%d\n", stoi(s2), stoi(s3), sum, ss.size());
        } else if(s1=="b") {
            py="-";
            cin>>s2>>s3;
            int sum=stoi(s2)-stoi(s3);
            string s4=to_string(sum);
            string ss=s2+"-"+s3+"="+s4;
            printf("%d-%d=%d\n%d\n", stoi(s2), stoi(s3), sum, ss.size());
        } else {
            if(py=="+") {
                cin>>s2;
                int sum=stoi(s1)+stoi(s2);
                string s3=to_string(sum);
                string ss=s1+"+"+s2+"="+s3;
                printf("%d+%d=%d\n%d\n", stoi(s1), stoi(s2), sum, ss.size());
            } else if(py=="*") {
                cin>>s2;
                int sum=stoi(s1)*stoi(s2);
                string s3=to_string(sum);
                string ss=s1+"*"+s2+"="+s3;
                printf("%d*%d=%d\n%d\n", stoi(s1), stoi(s2), sum, ss.size());
            } else if(py=="-") {
                cin>>s2;
                int sum=stoi(s1)-stoi(s2);
                string s4=to_string(sum);
                string ss=s1+"-"+s2+"="+s3;
                printf("%d-%d=%d\n%d\n", stoi(s1), stoi(s2), sum, ss.size());
            }
        }
    }

}

by White_Falcon @ 2023-07-16 11:19:45

嗨嗨嗨

by White_Falcon @ 2023-07-16 11:20:03

让我看看

by White_Falcon @ 2023-07-16 11:22:18

我这边运行不了呀...

by White_Falcon @ 2023-07-16 11:23:28

@XieXiangLa

by PC114514 @ 2023-07-16 11:23:49

改完了

#include<bits/stdc++.h>
using namespace std;
string py;
int main() {
    int n;
    cin>>n;
    string s1, s2, s3;
    for(int i=0; i<n; i++) {
        cin>>s1;
        if(s1=="a") {
            py="+";
            cin>>s2>>s3;
            int sum=stoi(s2)+stoi(s3);
            string s4=to_string(sum);
            string ss=s2+"+"+s3+"="+s4;
            printf("%d+%d=%d\n%d\n", stoi(s2), stoi(s3), sum, ss.size());
        } else if(s1=="c") {
            py="*";
            cin>>s2>>s3;
            int sum=stoi(s2)*stoi(s3);
            string s4=to_string(sum);
            string ss=s2+"*"+s3+"="+s4;
            printf("%d*%d=%d\n%d\n", stoi(s2), stoi(s3), sum, ss.size());
        } else if(s1=="b") {
            py="-";
            cin>>s2>>s3;
            int sum=stoi(s2)-stoi(s3);
            string s4=to_string(sum);
            string ss=s2+"-"+s3+"="+s4;
            printf("%d-%d=%d\n%d\n", stoi(s2), stoi(s3), sum, ss.size());
        } else {
            if(py=="+") {
                cin>>s2;
                int sum=stoi(s1)+stoi(s2);
                string s3=to_string(sum);
                string ss=s1+"+"+s2+"="+s3;
                printf("%d+%d=%d\n%d\n", stoi(s1), stoi(s2), sum, ss.size());
            } else if(py=="*") {
                cin>>s2;
                int sum=stoi(s1)*stoi(s2);
                string s3=to_string(sum);
                string ss=s1+"*"+s2+"="+s3;
                printf("%d*%d=%d\n%d\n", stoi(s1), stoi(s2), sum, ss.size());
            } else if(py=="-") {
                cin>>s2;
                int sum=stoi(s1)-stoi(s2);
                string s3=to_string(sum);
                string ss=s1+"-"+s2+"="+s3;
                printf("%d-%d=%d\n%d\n", stoi(s1), stoi(s2), sum, ss.size());
            }
        }
    }

}

by PC114514 @ 2023-07-16 11:25:10

第一是为什么要循环2n次，导致WA 第二是在48行 没有运算符运行减法时s3打成了s4

by White_Falcon @ 2023-07-16 11:25:51

哦，我好了

by PC114514 @ 2023-07-16 11:26:03

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