题解 | #简单计算器#

#include <stdio.h>

int main() {
    double a, b;
    char c;
    scanf("%lf%c%lf",&a,&c,&b);
    if(c=='+')
    printf("%.4lf+%.4lf=%.4lf",a,b,a+b);
    else if(c=='-')
    printf("%.4lf-%.4lf=%.4lf",a,b,a-b);
    else if(c=='*')
    printf("%.4lf*%.4lf=%.4lf",a,b,a*b);
    else if(c=='/')
    {if(b==0.0)
    printf("Wrong!Division by zero!");
    else
    printf("%.4lf/%.4lf=%.4lf",a,b,a/b);
    }
    else {
    printf("Invalid operation!");
    }
    return 0;
}