matice, C (vc) - rextester

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#include <stdio.h>

#define SLOUPCE 6
#define RADKY 3
int main(void)
{
    int matA[RADKY][SLOUPCE] = 
        {
        { 0,  1,  2,  3,  4,  5},
        { 6,  7,  8,  9, 10, 11},
        {12, 13, 14, 15, 16, 17}, 
        };
    int matB[RADKY][SLOUPCE] =
        {
        { 0,  1,  2,  3,  4,  5},
        { 6,  7,  8,  9, 10, 11},
        {12, 13, 14, 15, 16, 17}, 
        };
    int matC[RADKY][SLOUPCE];
    
    // Prirazeni matice
    for(size_t r = 0; r < RADKY; ++r)
        for(size_t s = 0; s < SLOUPCE; ++s)
             matC[r][s] = matA[r][s];
        
    // Tisk kopirovane matice
        
    printf("\nMatice C:\n");
    for(size_t r = 0; r < RADKY; ++r)
        {
        for(size_t s = 0; s < SLOUPCE; ++s)
            printf("%d\t", matC[r][s]);
        
        putchar('\n');         
        }
        
    // Scitani matic
    for(size_t r = 0; r < RADKY; ++r)
        for(size_t s = 0; s < SLOUPCE; ++s)
             matC[r][s] = matA[r][s] + matB[r][s];

// Tisk vysledne matice
    printf("\nSoucet A+B:\n");
    for(size_t r = 0; r < RADKY; ++r)
        {
        for(size_t s = 0; s < SLOUPCE; ++s)
            printf("%d\t", matC[r][s]);        
        putchar('\n');         
        }
            
    return 0;
}

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Compilation time: 1,45 sec, absolute running time: 2,32 sec, absolute service time: 3,78 sec