Question

How to create a matrix with random numbers between 1 and 100 in C

Answer 1

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
 
#define ROWS 5
#define COLS 6

void printMatrix(int matrix[][COLS]) {
    for (int i = 0; i < ROWS; i++) {  
        for (int j = 0; j < COLS; j++) {
            printf("%4d", matrix[i][j]);
        } 
        printf("\n");
    }
}
  
int generateRandomInteger(int min, int max) {
    return min + rand() / (RAND_MAX / (max - min + 1) + 1);
    // return rand() % (max - min + 1) + min;
}
      
void generateRandomMatrix(int matrix[][COLS]) {
    srand(time(NULL));
     
    for (int i = 0; i < ROWS; i++) {     
        for (int j = 0; j < COLS; j++) {
            matrix[i][j] = generateRandomInteger(1, 100);
        }
    }
}

int main() {
    int matrix[ROWS][COLS] = {{ 0 }};
     
    generateRandomMatrix(matrix);
        
    printMatrix(matrix);

    return 0;
}
 
 
 
 
/*
run:
  
  72   9   5  77  96  30
  40  41  50  61  92   8
  79  99   2  39  50 100
  89  38 100  14  71  19
  89  25  17   9  97  27
  
*/

 

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