#include <stdio.h>
#include <math.h>
int main() {
double a = 0, b = 0, c = 0 ;
double x1 = 0, x2 = 0 ;
while( scanf( "%d%d%d", &a, &b, &c) != EOF ) {
if ( ( b * b ) - 4 * a * c > 0 ) {
x1 = ( -b + sqrt( ( b * b ) - 4 * a * c ) ) / 2 / a ;
x2 = ( -b - sqrt( ( b * b ) - 4 * a * c ) ) / 2 / a ;
printf( "Two different roots x1=%d , x2=%d\n", x1, x2 ) ;
}
else if ( ( b * b ) - 4 * a * c == 0 ) {
x1 = ( -b ) / 2 / a ;
printf( "Two same roots x=%d\n", x1 ) ;
}
else {
printf( "No real root\n" ) ;
}
}
return 0 ;
}
我放進去測試馬上CE
可是Dev C++ 中是正常的欸
#include
#include
int main() {
double a = 0, b = 0, c = 0 ;
double x1 = 0, x2 = 0 ;
while( scanf( "%d%d%d", &a, &b, &c) != EOF ) {
if ( ( b * b ) - 4 * a * c > 0 ) {
x1 = ( -b + sqrt( ( b * b ) - 4 * a * c ) ) / 2 / a ;
x2 = ( -b - sqrt( ( b * b ) - 4 * a * c ) ) / 2 / a ;
printf( "Two different roots x1=%d , x2=%d\n", x1, x2 ) ;
}
else if ( ( b * b ) - 4 * a * c == 0 ) {
x1 = ( -b ) / 2 / a ;
printf( "Two same roots x=%d\n", x1 ) ;
}
else {
printf( "No real root\n" ) ;
}
}
return 0 ;
}
我放進去測試馬上CE
可是Dev C++ 中是正常的欸
你用 sqrt 難免產生誤差，
我是想辦法把等號2邊都平方，避免使用 sqrt
#include
#include
int main() {
double a = 0, b = 0, c = 0 ;
double x1 = 0, x2 = 0 ;
while( scanf( "%d%d%d", &a, &b, &c) != EOF ) {
if ( ( b * b ) - 4 * a * c > 0 ) {
x1 = ( -b + sqrt( ( b * b ) - 4 * a * c ) ) / 2 / a ;
x2 = ( -b - sqrt( ( b * b ) - 4 * a * c ) ) / 2 / a ;
printf( "Two different roots x1=%d , x2=%d\n", x1, x2 ) ;
}
else if ( ( b * b ) - 4 * a * c == 0 ) {
x1 = ( -b ) / 2 / a ;
printf( "Two same roots x=%d\n", x1 ) ;
}
else {
printf( "No real root\n" ) ;
}
}
return 0 ;
}
我放進去測試馬上CE
可是Dev C++ 中是正常的欸
你用 sqrt 難免產生誤差，
我是想辦法把等號2邊都平方，避免使用 sqrt
#include
#include
int main() {
double a = 0, b = 0, c = 0 ;
double x1 = 0, x2 = 0 ;
while( scanf( "%d%d%d", &a, &b, &c) != EOF ) {
if ( ( b * b ) - 4 * a * c > 0 ) {
x1 = ( -b + sqrt( ( b * b ) - 4 * a * c ) ) / 2 / a ;
x2 = ( -b - sqrt( ( b * b ) - 4 * a * c ) ) / 2 / a ;
printf( "Two different roots x1=%d , x2=%d\n", x1, x2 ) ;
}
else if ( ( b * b ) - 4 * a * c == 0 ) {
x1 = ( -b ) / 2 / a ;
printf( "Two same roots x=%d\n", x1 ) ;
}
else {
printf( "No real root\n" ) ;
}
}
return 0 ;
}
我放進去測試馬上CE
可是Dev C++ 中是正常的欸