/* Source code to find ASCII value of a character entered by user */ 
#include<stdio.h>
int main()
{ 
char c; 
printf("Enter a character: "); 
scanf("%c",&c); /* Takes a character from user */ 
printf("ASCII value of %c = %d",c,c); 
return 0; 
} 
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/* This program computes the size of variable using sizeof operator.*/ 
#include<stdio.h>
int main()
{ 
int a; 
float b; 
double c; 
char d; 
printf("Size of int: %d bytes\n",sizeof(a)); 
printf("Size of float: %d bytes\n",sizeof(b)); 
printf("Size of double: %d bytes\n",sizeof(c)); 
printf("Size of char: %d byte\n",sizeof(d)); 
return 0; 
} 

Output:
Size of int: 4 bytes 
Size of float: 4 bytes 
Size of double: 8 bytes 
Size of char: 1 byte