test.c

// small test (compiled with DJGPP for MSDOS)

#include <stdio.h>

int main(int argc, char *argv[])
{
    int a;
    char *arg;

    if (argc == 0) {
        printf("No command line arguments.\n");
        return 0;
    }

    printf("Checking command line arguments.\n");
    for (a = 1; a < argc; ++a) {
        arg = argv[a];
        printf("arg: %s\n", arg);
    }

    // crashes here:
    printf("Checking character at index 1 of the command line arguments.\n");
    for (a = 1; a < argc; ++a) {
        arg = argv[a];
        printf("arg: %s\n", arg[1]);
    }

    return 0;
}