题解 | #简单计算器#

#include <stdio.h>

int main() { double x = 0; double y = 0; char a = 0; scanf("%lf%c%lf", &x, &a, &y);

if (a == '+')
{
    printf("%.4lf%c%.4lf=%.4lf", x, a, y, x+y);
}
else if (a == '-')
{
    printf("%.4lf%c%.4lf=%.4lf", x, a, y, x-y);
}
else if (a == '*')
{
    printf("%.4lf%c%.4lf=%.4lf", x, a, y, x*y);
}
else if (a == '/')
{
    if (y == 0)
    {
        printf("Wrong!Division by zero!\n");
    }
    else
    {
        printf("%.4lf%c%.4lf=%.4lf", x, a, y, x*1.0/y);
    }
}
else
{
    printf("Invalid operation!\n");
}
return 0;

}