Thread: Compile Error:

here's my compile error.

Code:

$ cc fig07_10.c
/tmp/cc5AugyJ.o: In function `main':
fig07_10.c:(.text+0x69): undefined reference to `convertToUpperCase'
collect2: ld returned 1 exit status

Code:

#include <stdio.h>
#include <ctype.h>

void convertToUpperCase( char * );


int main()
{
	char string[] = "characters and $32.98";

	printf( "The string before conversion is: &#37;s", string );
	convertToUpperCase( string );
	printf( "\nThe string after conversion is: %s\n", string );
	printf( "\nThe string after conversion is: %s\n",  string );

	return 0;
}



void convertToUppercase( char *sPtr )
{
	while ( *sPtr != '\0' ) {
		if ( islower( *sPtr ) )
			*sPtr = toupper( *sPtr );

		++sPtr;
	}
}

I think gcc needs an extra argument but I don't understand why or what it is.

Originally Posted by yougene

Code:

void convertToUpperCase( char * );
void convertToUppercase( char *sPtr )

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