Question

Prepare a C program that is a single source code file that declares at least one external variable, and initializes the variable. Then performs a loop of at least 10 iterations that calls a function, then increments the external variable. The function uses a static variable, prints both the external variable and the static variable, then increments the static variable.

Answer 1

#include <stdio.h>

//declare and initialize external variable a
int a=5;

//definition of main functiom
int main(void)
{
//for loop which goes for 10 iterations
for(int i=1;i<=10;i++)
{
//call the function
fun();
//increment external variable
a++;
}

return 0;
}

//function fun definition
void fun()
{
//declare and initialize static variable
static int b = 100;

//print the extetnal variable
printf("\nExternal variable a :%d",a);
  
//print the static variablr
printf("\nStatic variable b : %d",b);
printf("\n----------------");
  
//increment static variable
b++;
}