Programming Example
Write a program to illustrate the results of type conversion from char to int data type.
Write a program to illustrate the results of type conversion from char to int data type.
/*
Program: Write a program to illustrate the results of type conversion
between signed and unsigned long and short integer data types.
Author: www.atnyla.com
*/
#include "stdio.h"
int main()
{
int si;
unsigned int usi;
char ch = 'a'; /* Most significant bit will be zero*/
si = ch; /* will give small +ve integer*/
usi = ch;
printf("c = %c\n si = %d\n usi = %u\n", ch, si, usi);
ch = '\377'; /* set all bits to 1 */
si = ch; /* sign extension makes negative */
usi = ch;
printf("si = %d\n usi = %u\n",si,usi);
return 0;
} c = a
si = 97
usi = 97
si = -1
usi = 4294967295
Press any key to continue . . .
First read the algorithm, then study the program code line by line. After that, compare the code with the output and finally go through the explanation. This approach helps learners understand both the logic and the implementation properly.
After understanding this example, try to rewrite the same program without looking at the code. Then change some values or logic and run it again. This helps improve confidence and keeps learners engaged on the page for longer.