c program length code example

Example 1: terminal size in c

#include <sys/ioctl.h>
#include <stdio.h>
#include <unistd.h>

int main (int argc, char **argv)
{
    struct winsize w;
    ioctl(STDOUT_FILENO, TIOCGWINSZ, &w);

    printf ("lines %d\n", w.ws_row);
    printf ("columns %d\n", w.ws_col);
    return 0;  // make sure your main returns int
}

Example 2: length of string c

int main() { char a[100]; int length;
printf("Enter a string to calculate its length\n"); gets(a);
length = strlen(a);
printf("Length of the string = %d\n", length);
return 0; }