Question

#include<stdio.h>

int main()
{
        int x = 1,*t;
        float y = 1.50,*u;
        char k = 'c',*v;

        t = &x;
        u = &y;
        v = &k;

        printf("%p %p %p", t, u, v);

        t++;
        u++;
        v++;

        printf("  %p %p %p", t, u, v);

        return 0;
}

Hi i have made this code but here something unusual is happening , i am printing the addresses , when i increase the address of all then from my view increment in int would be 2 , float would be 4 and char would be 1 but i got the following :

0xbffa6ef8 0xbffa6ef0 0xbffa6eff  0xbffa6efc 0xbffa6ef4 0xbffa6f00

For float and char i think its correct but for int i don’t know why it is giving so

Answer 1

You are assuming the sizeof(int) is 2 on your system/envrionment.

However, Your assumption is not correct. The standard does not require the size of int to be 2 or anything specific.

As your program shows the size of int is 4 on your system/envrionment.

Lesson to Learn:
Never rely or assume on size of an type, always use sizeof to determine the size, that is the reason the standard provides sizeof.