Question

What is the difference between %i and %d in scanf() with C

Answer 1

#include <stdio.h> 
  
int main() 
{ 
    int a, b, c;
    
    scanf("%i %i %i", &a, &b, &c);
    printf("a = %i b = %i c = %i\n", a, b, c); // take (base 10), hex (base 16) and octal (base 8)

    a = b = c = -1;
    
    scanf("%d %d %d", &a, &b, &c);
    printf("a = %d b = %d c = %d\n", a, b, c); // take only base 10 
    
    return 0; 
}



// 15 (base 10) = 15 (base 10)
// 0x15 (base 16) = 21 (base 10)
// 015 (base 8) = 13 (base 10)



/*
run:

15 0x15 015
a = 15 b = 21 c = 13
15 0x15 015
a = 15 b = 0 c = -1

*/

 

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