Conversion from char to int

See more:

C

Hi Guys , i want to write a pogramme that convert all chars to int with a for loop , i don't know what to put in my char variable as a first value

What I have tried:

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int i;
    char c ;
    c = 
    system("color a ");
    for(i=0;i<=255;i++)
    {
        printf("%c to int is : %d",c,c);
        printf("\n");
    }
    return 0;
}