/*1 4 7 for no error
  0 0 0 for error in 1
  1 1 2 for error in 2
  0 1 2 for error in 3
  1 2 3 for error in 4*/
#include<setjmp.h>
#include<stdio.h>

int fun4(jmp_buf env ,int i){
	if(i==0) longjmp(env,4);
	return 10;
}
int fun3(jmp_buf env,int j){
	if(j==3) longjmp(env,3);
	return fun4(env,j+1);
}
int fun2(jmp_buf env,int p,int q){
	if(p==2) longjmp(env,2); 
	return fun3(env,p+q)+fun3(env,p-q);
}
int fun1(jmp_buf env,int l,int m, int n){
	if((l+m+n)==0) longjmp(env,1);
	return fun2(env,l+m,l+n);
}

main(){
	jmp_buf env;
	int s,l,m,n;
	printf("Enter values(integer) for l m and n please\n");
	scanf("%d%d%d",&l,&m,&n);
	
	s=setjmp(env);
	if(s!=0){
		printf("There is an error in function %d exiting..\n",s);
		exit(0);
	}
	fun1(env,l,m,n);
		printf("The functions executed normally\n");

}