返回1退出状态

Question

/* QuadircEquation.c */
#include <stdio.h>
#include <math.h>

int QuadircEquation(void) {
    double root1, root2, discriminant, a, b, c;
    discriminant = b * b - 4 * a * c;
    root1 = (-b + sqrt(discriminant))/(2*a);
    root2 = (-b - sqrt(discriminant))/(2*a);

    printf("Enter coeficients a, b, and c: ");
    scanf("%lf %lf %lf", &a, &b, &c);

    if (discriminant = 0)
        printf("%lf \n", root1);

    else if (discriminant > 0)
        printf("%lf %lf", root1, root2);

    else 
        printf("There is no root");

    printf("\n");


    return 0;
}

这是在C. 它返回时出现以下错误：＆＃34;未定义引用`WinMain @ 16＆＃39; collect2.exe：错误：ld返回1退出状态＆＃34;