Function to compare different files

Question

I've written a function that compares two different files and it prints if they're equal or not. The problem is that the files are the same and at some point it returns as FAILED.

void comparar_conteudo(){

    for(int i = 1; i <= 10; i++){

        int bp = 0;
        char ficheiro1[100] = "saida/command";
        char ficheiro2[100] = "expected/exp_query";

        char commandString[2]; sprintf(commandString, "%d", i);

        strcat(ficheiro1, commandString); strcat(ficheiro2, commandString);
        strcat(ficheiro1, "_output.txt"); strcat(ficheiro2, ".txt");

        FILE *novoFile1 = fopen(ficheiro1, "r");
        FILE *novoFile2 = fopen(ficheiro2, "r");

        char* line1 = malloc(sizeof(char));
        char* line2 = malloc(sizeof(char));

        while(fgets(line1, 1024, novoFile1)){

            fgets(line2, 1024, novoFile2);

            if(strcmp(line2,line1) != 0){
                bp = 1;
                break;
            }
        }

        if(bp == 0)
            printf("Query %d: SUCCESS\n", i);

        else
            printf("Query %d: FAILED\n", i);

        fclose(novoFile1);
        fclose(novoFile2);
        free(line1);
        free(line2);
    }
}

Answer 1

once you did this

    char* line1 = malloc(sizeof(char));
    char* line2 = malloc(sizeof(char));

    while(fgets(line1, 1024, novoFile1)){