strmanip1.c

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <string.h>
char* strcpyy(char* s2, const char* s1);
int strlenn(const char* s);
char* strcatt(char* s1, const char* s2);

int main() {
    char str1[30] = "Hello, ";
    char str2[] = "World!";
    printf("count of str1 = %d\n", strlenn(str1));
    strcatt(str1, str2);
    printf("Concatenated string: %s\n", str1);  // Output: "Hello, World!"
    return 0;
}

char* strcpyy(char* s2, const char* s1)
{
    while (*s1)
    {
        *s2 = *s1;
        s1++;
        s2++;
    }
    *s2 = '\0';
    return s2;
}


char* strcatt(char* s1, const char* s2)
{
    int first_end = strlenn(s1);
    while (*s2)
    {
        *(s1 + first_end) = *s2;
        first_end++;
        s2++;
    }
    *(s1 + first_end) = '\0';

    return s1;
}

int strlenn(const char* s)
{
    int count = 0;
    while (*s)
    {
        s++;
        count++;
    }
    return count;
}