Programming in C

Arrays of Characters 197

Program 10.1 Concatenating Character Arrays

// Function to concatenate two character arrays

#include <stdio.h>

void concat (char result[], const char str1[], int n1,
const char str2[], int n2)
{
int i, j;

// copy str1 to result

for ( i = 0; i < n1; ++i )

result[i] = str1[i];

// copy str2 to result

for ( j = 0; j < n2; ++j )
result[n1 + j] = str2[j];
}

int main (void)
{
void concat (char result[], const char str1[], int n1,
const char str2[], int n2);
const char s1[5] = { 'T', 'e', 's', 't', ' '};
const char s2[6] = { 'w', 'o', 'r', 'k', 's', '.' };
char s3[11];
int i;

concat (s3, s1, 5, s2, 6);

for ( i = 0; i < 11; ++i )

printf ("%c", s3[i]);

printf ("\n");

return 0;
}

Program 10.1 Output

Test works.