Question

How to swap the first two digits in int number in C

Answer 1

#include <stdio.h>
#include <stdlib.h>
 
int main() {
    char s[16]; 
    int n = 74396;
 
    sprintf(s, "%d", n);
    puts(s);
    
    char tmp = s[0];
    s[0] = s[1];
    s[1] = tmp;
    
    n = atoi(s);
    printf("%d\n", n);
    
}
 
 
 
/*
run:
 
74396
47396
 
*/

 

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