Help understanding this compilation error

     #include<stdio.h>
    void show()
    {
    int a[100],b[100],x,y=1,z,m,k,w=0,h,i,t=1,s=0;
    scanf("%d",&x);
    for(i=0;i<x;i++)
    scanf("%d,%d",&a[i],&b[i]);
    while( y<=x)
    {
    z=a[i];
    while(z<=b[i])
    {k=z;
    while(k!=0)
    {
    h=k/10;
    k=k%10;
    if(!(h==4)&&!(h==7))
    t=0;}
    if(t!=0)
    {k=z;
    while(k!=0)
    {k=k%10;
    s++;
    }
    }
    if(s==4||s==7)
    w++;
    z++;
    }
    m=w%100000007;
    printf("\n%d",m);
    y++;
    }
    } 

``So I submitted this code for Lucky2 Problem but a compilation error showed up saying:

/usr/lib/gcc/i486-linux-gnu/4.8/…/…/…/i386-linux-gnu/crt1.o: In function _start': (.text+0x18): undefined reference to main’
collect2: error: ld returned 1 exit status

Can anyone plz explain it to me…I mean what have I done wrong here?

It’s simple your code does not contain main() function.

1 Like

Corrected my code…n now it says time limit exceeded,optimize it…Anywayz thank you

main() Function missing
it should be
#include<stdio.h>
void main ()

//