mystrcat

#include <stdio.h>

char * strcat(char *strDest,const char * strSrc)
{
char *r=strDest;
char *p=strDest;

while(*p++ != '\0');
p--;
while(*strSrc != '\0')
{
*p++ = *strSrc++;

}
*p = '\0';
return r;
}


int main()
{
char str1[100] = {'\0'};
char str2[100] = {'\0'};

char * ret = NULL;

puts("please intput two string to strcat,the two string length max = 99");	
puts("eg: abcdef ABCDEF");

scanf("%s%s",str1,str2);

printf("\n");
ret = strcat(str1,str2);	
printf("result: %s\n",ret);

return 0;	
}