题解 | #简单计算器#

#include <stdio.h>

int main() {
    double a,b,c;
    char d;
   scanf("%lf%c%lf",&a, &d, &b);
    if(d==43)
    {
        c=a+b;
        printf("%.4lf+%.4lf=%.4lf",a,b,c);
    }
    else if (d==42) {
        c=a*b;
        printf("%.4lf*%.4lf=%.4lf",a,b,c);
    
    }
    else if (d==45) {
        c=a-b;
        printf("%.4lf-%.4lf=%.4lf",a,b,c);
    
    }
    else if (d==47) {
        if (b==0) {
            printf("Wrong!Division by zero!");
        
        }
        else {
        c=a/b;
          printf("%.4lf/%.4lf=%.4lf",a,b,c);
        }
    
    }
    else {
    printf("Invalid operation!");
    }
    return 0;
}