Q12

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

void printRandomLine(char* filename);

int main() {

    for(int i=1; i<5; i++) {
        int num = i;
        char snum[5];
        sprintf(snum, "%d", num);

        char str1[50], str2[50];
        strcpy(str1, "c");
        strcpy(str2, snum);
        strcat(str1, str2);
        strcat(str1, ".txt");
        printRandomLine(str1);
    }

    return 0;
}

void printRandomLine(char* filename) {
    FILE* s1 = fopen(filename, "r");
    char str[100];

    srandom(time(NULL));
    long rand = random() % 10;
    int lineCounter = 0;
    char c = fgetc(s1);

    while(lineCounter < rand) {
        if(c == '\n') {
            lineCounter++;
        }
        c = fgetc(s1);
    }

    fseek(s1, -1, SEEK_CUR);

    fgets(str, 100, s1);
    fputs(str, stdout);
}