concatenate char * c

To concatenate two char* strings in C, you can use the strcat() function from the C standard library. Here's an example:

#include <stdio.h>
#include <string.h>

int main() {
    char str1[50] = "Hello";
    char str2[] = " World!";

    strcat(str1, str2);

    printf("Concatenated string: %s\n", str1);

    return 0;
}

This code declares two char arrays, str1 and str2, and initializes str1 with the string "Hello" and str2 with the string " World!". The strcat() function is then used to concatenate str2 to the end of str1. Finally, the concatenated string is printed using printf().

When you run this code, the output will be:

Concatenated string: Hello World!

Please note that the size of str1 should be large enough to accommodate the concatenated string. If str1 is not large enough, it may result in a buffer overflow, which can lead to undefined behavior.