View Code of Problem 77

#include<stdio.h>
int mian(){
int i,j,m,n,k;
int a[4];
scanf("%d",&n);
for(i=0;i<=3;i++){
  a[i]=n%10;
  n=n/10;
  }  
  for(i=3;i>0;i--){
  printf("%d ",a[i]);
  }
  printf("%d\n",a[0]);
}
/*
Main.c: In function 'mian':
Main.c:3:13: warning: unused variable 'k' [-Wunused-variable]
 int i,j,m,n,k;
             ^
Main.c:3:9: warning: unused variable 'm' [-Wunused-variable]
 int i,j,m,n,k;
         ^
Main.c:3:7: warning: unused variable 'j' [-Wunused-variable]
 int i,j,m,n,k;
       ^
Main.c:14:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^
/usr/lib/gcc/x86_64-linux-gnu/4.9/../../../x86_64-linux-gnu/crt1.o: In function `_start':
(.text+0x20): undefined reference to `main'
collect2: error: ld returned 1 exit status
*/