The code to type the text in a new line is wrong. Instead of \n there is just n as shown below.
#include <stdio.h>
int main () {
/* variable definition */
int x, y;
int z;
float a;
/* initialization */
x = 7;
y = 4;
z = x + y;
printf(“value of z : %d n”, z);
a = 8.2/2;
printf(“value of a : %a n”, a);
return 0;
}