bool function

[Chin Pei Ying]

how to use bool to identified a identity matrix

[kbw]

You need to define a 2D array of bool.

[Chin Pei Ying]

#include <fstream>
#include<iostream>
#include <iomanip>
#include <stdlib.h>
#include <conio.h>
#include <cmath>
bool check( int[][3] , int);
using namespace std;
#define size 3

void main()
{
int b=0;
int c[3][3] ={ {1,0,0},{0,1,0},{0,0,1}};
if(check(c,b))
cout << "It is a identity function";
else
cout << "not";
_getch();
}
bool check ( int d[][3], int e)
{
bool flag= false;
for(int i=0; i<3; i++){
for (int j=0; j<3; j++){
if ( !(i=j)){
if( d[i][i]== e )
flag=true;
else
return false;
}
else{
if(d[i][j]== d[i][j])
flag=true;
else
return false;
}
}
return flag;
}
}

[Chin Pei Ying]

Is it any wrong with my program?
I can just cout not,i fail to cout identity function.

[Chin Pei Ying]

#include <fstream>
#include<iostream>
#include <iomanip>
#include <stdlib.h>
#include <conio.h>
#include <cmath>
bool check( int[][3] , int);
using namespace std;
#define size 3

void main()
{
int b=0;
int c[3][3] ={ {1,0,0},{0,1,0},{0,0,1}};
if(check(c,b))
cout << "It is a identity function";
else
cout << "not";
_getch();
}
bool check ( int d[][3], int e)
{
bool flag= false;
for(int i=0; i<3; i++){
for (int j=0; j<3; j++){
if ( !(i=j)){
if( d[i][i]== e )
flag=true;
else
return false;
}
else{
if(d[i][j]== d[i][j])
flag=true;
else
return false;
}
}
return flag;
}
}

[Chin Pei Ying]

Is it any problem with this program?
i can just cout not.

[MikeyBoy]

Have you tried stepping through it with a debugger? That will show you which conditions are evaluating to true or false, which will show you what's going wrong.

Also, please use code tags when posting code, to make it readable.

[Chin Pei Ying]

sorry,i solve it already.Thank you,is syntax error.