学步园

#include <stdio.h>

int strcmp_test(char*source, char *dest) 
{    
while ( (*source != '\0') &&(*source == *dest))   
 {
	source++; 
	dest++;   
}   
 return ( (*source) - (*dest) ) ? -1 : 0; 
}

void main()
{
      char str1[]="abcd";
	  char str2[]="abcD";
	  int i=strcmp_test(str1,str2);
	  printf("%d \n",i);
}