c源码编译

#include<stdio.h>
#include<math.h>               //程序中要调用求平方根函数sqrt

int main()
{
    double a,b,c,disc,x1,x2,p,q;
    scanf("%lf%lf%lf",&a,&b,&c);
    disc = b * b - 4 * a * c;
    p = -b / (2.0 * a);
    q = sqrt(disc) / (2.0 * a);
    x1 = p + q,x2 = p - q;
    printf("x1=%7.2f\nx2=%7.2f\n",x1,x2);
    return 0;
}

gcc -o 5-5 5-5.c -lm