Tumpukan

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

char* stack[10];

void push(char foo[]) {
    int counter;
    for (counter = 0; counter < sizeof(stack); counter++) {
        if (stack[counter] != NULL) {
            strcpy(stack[counter], foo);
            break;
        }
    }
}

int main(int argc, const char *argv[]) {
    int i;

    for (i = 0; i < 10; i++) stack[i] = malloc(20 * sizeof(char));
    for (i=1; i < argc; i++)  push(argv[i]);

    printf("%s\n",stack[0]);
    printf("%s\n",stack[1]);
    printf("%s\n",stack[2]);
    return 0;
}