How to use a loop to write program code to

Question

2. Searching to search for a specific letter (int k). 3. Frequency: to count the frequency of k.
In this program:

#include <stdio.h>
#include<string.h>
char merge(char a[], char b[]);
// int search(const char c[]);
// void frequency(const char c, char k);
int main()
{
char firstName[] = "hessah";
char lastName[]= "alrashidi";
char fullName[50];
int n=0;
for(int i=0; i<(int)strlen(firstName); i++,n++)
fullName[n] =firstName[i];

fullName[n++] = ' ';
for(int i=0; i<(int)strlen(lastName); i++,n++)
fullName[n] = lastName[i];

fullName[n] = '\0';
for(int i=0; i<(int)strlen(fullName); i++)
printf("%c",fullName[i]);

return 0;
}

Answer 1

See this
https://www.sololearn.com/learn/CPlusPlus/1616/

Answer 2

I know but how to use the array function with this programming code

Answer 3

Can you give me an example of this program? and Thank you