#include <stdio.h>
int main()
{
char s1[100], s2[100], i, j;
printf("Enter first string: ");
scanf("%s", s1);
printf("Enter second string: ");
scanf("%s", s2);
// calculate the length of string s1
// and store it in i
for(i = 0; s1[i] != '\0'; ++i);
for(j = 0; s2[j] != '\0'; ++j, ++i)
{
s1[i] = s2[j];
}
s1[i] = '\0';
printf("After concatenation: %s", s1);
return 0;
}
Enter first string: lol
Enter second string: :)
After concatenation: lol:)
You can concatenate two strings easily using standard library function strcat() but, this program concatenates two strings manually without using strcat() function.
First understand the algorithm carefully. Then study the program line-by-line and compare it with the output. Finally, review the explanation section to strengthen your logic and programming understanding.
Rewrite the program without looking at the code. Modify values, conditions or logic and run it again. This helps improve confidence and strengthens coding skills much faster.