plz redo this codein Cusingsystem functionsinstead of the standard functions i have:

#include #include

int main(int argc, char const *argv[]) { // if entered file list is not sufficient if (argc printf("Enter required file names "); exit(0); }

// last filename entered would be the resultant file FILE *resultFile = fopen(argv[argc - 1], "w"), *f;

// checking if file opening is successful or not if (resultFile == NULL) { printf("Error opening file %s ", argv[argc - 1]); exit(1); }

// buffer to read the files line by line char buff[1000];

// loop to read the entered files for (int i = 1; i // opening the file f = fopen(argv[i], "r");

// checking if it opened or not if (f == NULL) { printf("Error opening file %s ", argv[i]); exit(1); }

// reading the file line by line and appending them to the resultFile while (fgets(buff, 1000, f)) { fprintf(resultFile, "%s", buff); }

// closing current file fclose(f); }

// closing resultFile fclose(resultFile);

return 0; }