void foo(){
}
int main(){
 foo();
printf("After foo..");
return 0;
}

#include<stdio.h>
 
void function() {
   char buffer1[5];
   buffer1[0] = 'Z'; 	
   char *ret = &buffer1[0];
   printf("\nbuffer1 is pointing at : %p", &buffer1); 	
   printf("\nret is pointing at address : %p and contains: %c",ret, *ret);	
   ret = buffer1 + 8;//point to where return address is stored..hope this is correct
   printf("\nret is now pointing at address: %p",ret);
 
   (*ret) += 8;//modify return address 
 
}
 
int main() {
  int x;
  x = 0;
  function();
  x = 5;//we are skipping the execution of this assignment....
  printf("\nx = %d\n",x);//shud print 0
  return 0;
}

buffer1 is pointing at : 0xbf85bd4f
ret is pointing at address : 0xbf85bd4f and contains: Z
ret is now pointing at address: 0xbf85bd57
x = 5

+==========================+-+
| locals for function()    | |
+==========================+ |
| return address           |  -->  stack frame for function()
+==========================+ |
| parameters for function  | |
+==========================+-+

#include<stdio.h>
 
void somefunct();
void anotherfunct();
 
int main(){
 
    somefunct();
 
    printf("returned to main!\n");
 
    return 0;
 
}
 
void somefunct(){
 
    int *ptr = (int*)&ptr + 2;
    *ptr = (int)&anotherfunct;
 
}
 
void anotherfunct(){
 
    printf("I win!\n\n");
 
}

~/c/t $ ./retaddr
I win!
 
Segmentation Fault
~/c/t $