homework3-1.c

求二元一次方程式有几解

#include <stdio.h>
#include <math.h>

int main()
{
    char buf[100];
    double a, b, c, d;
   
    for(gets(buf); buf[0] != 0; gets(buf)){
        if (sscanf(buf, "%lf %lf %lf %lf", &a, &b, &c, &d) != 3){
            printf("Please input three floats in a line.\n");
        }
        else{
            if(a==0){
                if(b==0){
                    if(c==0){
                        printf("Τ礚