Program to Concatenation Two Strings In C

Program to Concatenation Two Strings In C

 #include
#include
void stcat(char *str1, char *str2);
void main()
{
        char *str1, *str2;
        clrscr();
        printf("\n\n\t ENTER THE FIRST STRING...: ");
        gets(str1);
        printf("\n\n\t ENTER THE SECOND STRING...: ");
        gets(str2);
        stcat(str1,str2);
        printf("\n\t THE CONCATENATED STRING IS...: ");
        puts(str1);
        getch();
}
void stcat (char *str1, char *str2)
{
        int i = 0,len = 0;
        while(*(str1+len)!='\0')
        len++;
       while(*(str2+i)!='\0')
       {
               *(str1+len) = *(str2+i);
               i++;
               len++;
       }
       *(str1+len) = '\0';
}