Question

How to generate all permutations of 1, 2 and 3 in C

Answer 1

#include <stdio.h>

int main(void) {

    for (int i = 1; i <= 3; i++) {  
        for (int j = 1; j <= 3; j++) {  
            for (int k = 1; k <= 3; k++) {  
                printf("%d %d %d\n", i, j, k);  
            }  
        }  
    }  
    
    return 0;
}



  
/*
run:
  
1 1 1
1 1 2
1 1 3
1 2 1
1 2 2
1 2 3
1 3 1
1 3 2
1 3 3
2 1 1
2 1 2
2 1 3
2 2 1
2 2 2
2 2 3
2 3 1
2 3 2
2 3 3
3 1 1
3 1 2
3 1 3
3 2 1
3 2 2
3 2 3
3 3 1
3 3 2
3 3 3

*/

 

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