Function Error Please help !!

[raheel1212]

See the problem here i get is undefined reference to `main' collect2: error: ld returned 1 exit status.
What is the mistake??
This Program is to count the no of spaces in a string with functions.

#include<iostream>
#include<stdio.h>
#include<string.h>
using namespace std;
int spaces(char);
int main()
{char x[20];int b;
cout<<" Enter a String "<<endl;
gets(x);
b=strlen(x);
cout<<endl<<" Spaces = "<<spaces(x[b]);
return 0;
}
char spaces(char x[20])
{int a=0,i;
for(i=0;x[i]!='\0';i++)
{if(x[i]==' ')
a++;
}
return a;
}

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[MiiNiPaa]

You have inconsistency here.

int spaces(char); //Takes single char

char spaces(char x[20]) //Takes array of exactly 20 chars 

[coder777]

The prototype (line 5) does not match the implementation (line14).

[raheel1212]

Haha MiiNiPaa its you again!!

Yeah so what should i change?


Should i write

int spaces(char[])

[raheel1212]

Still i am getting a error..

[MiiNiPaa]

Yes, you need to write it in both prototype and implementation. Or use char* as it is real type of your function argument.

[coder777]

MiiNiPaa wrote:

char spaces(char x[20]) //Takes array of exactly 20 chars

Nope, it's equivalent to char spaces(char x[]) or char spaces(char *x).
I.e. the number [20] will be ignored.

line 5: int spaces(const char *);
line 11: cout<<endl<<" Spaces = "<<spaces(x[b]);
line 14: int spaces(const char *x)