Redefinition of 'int str_find(char*, char*)' error-CodePudding

I am trying to run the following code:

Main C file:

#include <stdio.h>
#include "my_functions.c"
#include "my_functions.h"

int main(int argv, char ** argc) {
    for (int i = 0; i < argv; i  )
        printf("%s\n", argc[i]);
    printf("%d\n", str_find("=","-h=123"));
    printf("%d\n",str_find("xyx", "aaaa"));
    return 0;
}

Included .c file for Main .c file from local Library / my_functions.c file

#include <stdio.h>

#include "my_functions.h"

int str_length(char* mystring){

    int i=0;

    while(*mystring!='\0'){

        i  ;

        mystring  ;

    }

    return i;
}

Included .h file for Main .c file from local Library / my_functions.h file

#ifndef MyFunctions_h
#define MyFunctions_h
#include <stdio.h>

void str_copy(char *destination, char *source){
    while(*source != '\0'){
        *destination = *source; 
        source  ; 
        destination  ;
    }
    *destination = '\0';
}

#endif

int str_find(char* needle, char* haystack) {
    int i = 0;
    int c = 0;
    while(*needle!='\0'){
          i;
          needle;
    }

    needle -= i;

    while(*haystack!='\0'){
          c;
          haystack;
    }

    haystack -= c;

    int k=0;
    int sp = 0;
   
    for(int d=0; d<=c;   d,   haystack)
    {
        if(*haystack==*needle && k==0)
        {
            sp = d;
              k;
              needle;
        }else if(*haystack!=*needle && k != 0)
        {
           needle -= k;
           k = 0;
        }
    }
    
    if(sp==0){
        return -1;
    }else{
        return sp;
    }
}

Here is the error I am receiving in the Output in Visual Studio Code, which comes from the imported my_functions.h file and the int str_find(char* needle, char* haystack) function :

redefinition of 'int str_find(char*, char*)'

I am unable to resolve this issue on my own and need help.

What needs to be done to solve this issue, so my code can run properly?

CodePudding user response：

The problem is that you did not guard declaration of the str_find.
main.c includes my_functions.c that includes my_functions.h and therefore declares str_find.
After that, you include my_functions.h that declares str_find again.

To fix that just move #endif to the bottom of my_functions.h