| Код |
#include<stdio.h>
#define MATRIX_DIM 5
int main( int argc, char* argv[] )
{
float matrix[ MATRIX_DIM ][ MATRIX_DIM ];
float temp;
int row, col, halfMatrixDim, rightCol, count;
printf( "Matrix %d x %d?\n", MATRIX_DIM, MATRIX_DIM );
for( row = 0; row < MATRIX_DIM; ++row )
{
for( col = 0; col < MATRIX_DIM; ++col )
scanf( "%f", &matrix[ row ][ col ] );
}
printf( "Source matrix:\n" );
for( row = 0; row < MATRIX_DIM; ++row )
{
for( col = 0; col < MATRIX_DIM; ++col )
printf( "%f\t", matrix[ row ][ col ] );
printf( "\n" );
}
halfMatrixDim = MATRIX_DIM / 2;
count = 0;
for( col = 0; col < halfMatrixDim; ++col )
{
for( row = col; row < MATRIX_DIM - col; ++row )
{
if( matrix[ row ][ col ] > 0.0f )
++count;
if( matrix[ row ][ MATRIX_DIM - col - 1 ] > 0.0f )
++count;
}
}
if( MATRIX_DIM % 2 == 1 && matrix[ halfMatrixDim ][ halfMatrixDim ] > 0.0f )
++count;
printf( "Count = %d\n", count );
for( col = 0; col < halfMatrixDim; ++col )
{
rightCol = MATRIX_DIM - col - 1;
for( row = 0; row < MATRIX_DIM; ++row )
{
temp = matrix[ row ][ col ];
matrix[ row ][ col ] = matrix[ row ][ rightCol ];
matrix[ row ][ rightCol ] = temp;
}
}
printf( "Matrix after exchange:\n" );
for( row = 0; row < MATRIX_DIM; ++row )
{
for( col = 0; col < MATRIX_DIM; ++col )
printf( "%f\t", matrix[ row ][ col ] );
printf( "\n" );
}
return 0;
}
|
Вариант
| Код |
#include<stdlib.h>
#include<stdio.h>
float** CreateMatrix( int dim )
{
int i, j;
float** matrix = NULL;
matrix = malloc( dim * sizeof( *matrix ) );
if( matrix != NULL )
{
i = 0;
do
{
matrix[ i ] = malloc( dim * sizeof( **matrix ) );
++i;
}
while( i < dim && matrix[ i - 1 ] != NULL );
if( i < dim || ( i == dim && matrix[ dim - 1 ] == NULL ) )
{
for( j = 0; j < i; ++j )
free( matrix[ j ] );
free( matrix );
matrix = NULL;
}
}
return matrix;
}
void DestroyMatrix( float** matrix, int dim )
{
if( matrix != NULL )
{
int i;
for( i = 0; i < dim; i++ )
free( matrix[ i ] );
free( matrix );
}
}
void InputMatrix( float** matrix, int dim )
{
int row, col;
for( row = 0; row < dim; ++row )
for( col = 0; col < dim; ++col )
scanf( "%f", &matrix[ row ][ col ] );
}
void PrintMatrix( float** matrix, int dim )
{
int row, col;
for( row = 0; row < dim; ++row )
{
for( col = 0; col < dim; ++col )
printf( "%f\t", matrix[ row ][ col ] );
printf( "\n" );
}
}
void ExchangeMatrixColumns( float** matrix, int dim )
{
int row, col, halfMatrixDim, rightCol;
float temp;
halfMatrixDim = dim / 2;
for( col = 0; col < halfMatrixDim; ++col )
{
rightCol = dim - col - 1;
for( row = 0; row < dim; ++row)
{
temp = matrix[ row ][ col ];
matrix[ row ][ col ] = matrix[ row ][ rightCol ];
matrix[ row ][ rightCol ] = temp;
}
}
}
int GetNumberOfPositiveElementsForMatrix( float** matrix, int dim )
{
int row, col, count, halfMatrixDim;
halfMatrixDim = dim / 2;
count = 0;
for( col = 0; col < halfMatrixDim; ++col )
{
for( row = col; row < dim - col; ++row )
{
if( matrix[ row ][ col ] > 0.0f )
++count;
if( matrix[ row ][ dim - col - 1 ] > 0.0f )
++count;
}
}
if( dim % 2 == 1 && matrix[ halfMatrixDim ][ halfMatrixDim ] > 0.0f )
++count;
return count;
}
int main( int argc, char* argv[] )
{
int dim, result;
float** matrix = NULL;
printf( "Matrix dimension?\n" );
scanf( "%d", &dim );
matrix = CreateMatrix( dim );
if( matrix == NULL )
{
printf( "CreateMatrix failed.\n" );
system( "pause" );
return 0;
}
printf( "Matrix %d x %d?\n", dim, dim );
InputMatrix( matrix, dim );
printf( "Source matrix:\n" );
PrintMatrix( matrix, dim );
result = GetNumberOfPositiveElementsForMatrix( matrix, dim );
printf( "Count = %d\n", result );
ExchangeMatrixColumns( matrix, dim );
printf( "Matrix after exchange:\n" );
PrintMatrix( matrix, dim );
DestroyMatrix( matrix, dim );
system( "pause" );
return 0;
}
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