C 70分求助

EkSulfur @ 2023-12-14 08:44:06

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
char s[10], c;

int calculate(int x, int y, char *a) {
    switch (*a) {
        case 'a': {
            *a = '+';
            return x + y;
            break;
        }
        case 'b': {
            *a = '-';
            return x - y;
            break;
        }
        case 'c': {
            *a = '*';
            return x * y;
            break;
        }
    }
    printf("ERR\n");
    return 0;
}

int main(void) {
    int n;
    scanf("%d", &n);
    char m[n];
    int a[n][3];
    for (int i = 0; i < n; i++) {
        m[i] = s[0];
        scanf("%s", &s);
        if ((int)strlen(s) > 1) {
            a[i][0] = atoi(s);
            scanf("%d", &a[i][1]);
            a[i][2] = calculate(a[i][0], a[i][1], &m[i]);
        } else {
            m[i] = s[0];
            scanf("%d%d", &a[i][0], &a[i][1]);
            a[i][2] = calculate(a[i][0], a[i][1], &m[i]);
        }
    }
    for (int i = 0; i < n; i++) {
        char ans[50];
        sprintf(ans, "%d%c%d=%d", a[i][0], m[i], a[i][1], a[i][2]);
        printf("%s\n%d\n", ans, (int)(strlen(ans)));
    }
    return 0;
}

by conancat @ 2023-12-14 11:24:14

#include<bits/stdc++.h>
using namespace std;
int main (){
int n;
cin>>n;//输入n 
char ch;//要输入的字母 
string s[n];//存放最后的表达式 
for(int i=0;i<n;i++){
        string st;
        stringstream io;
        int a,b,ans=0;//ans是答案 
        if(!(cin>>a))//利用了cin的性质 
        {
            cin.clear();
            cin>>ch>>a;
        }
        cin>>b;
        io<<a;io>>s[i];io.clear();//接下来对ch进行判断 
        if(ch=='a')
        {
            ans=a+b;
            s[i]+='+';
            io<<b;io>>st;io.clear();//io每次用完后要记得清空哦
            s[i]+=st;
            s[i]+='=';
            io<<ans;io>>st;io.clear();
            s[i]+=st;
        }//以此类推
    if(ch=='b')
        {
            ans=a-b;
            s[i]+='-';
            io<<b;io>>st;io.clear();
            s[i]+=st;
            s[i]+='=';
            io<<ans;io>>st;io.clear();
            s[i]+=st;
        }
    if(ch=='c')
        {
            ans=a*b;
            s[i]+='*';
            io<<b;io>>st;io.clear();
            s[i]+=st;
            s[i]+='=';
            io<<ans;io>>st;io.clear();
            s[i]+=st;
        }
    }
    for(int i=0;i<n;i++)//循环输出结果 
    {
        cout<<s[i]<<endl;
        cout<<s[i].size();
        if(i!=n-1)cout<<endl;
    }
}