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