Compilare: main.cpp: In function 'int main()': main.cpp:14:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d %d", &k, &q); ^ main.cpp:16:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%c", &v[i]); ^ main.cpp:19:31: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &n); ^ main.cpp:51:44: warning: 'z' may be used uninitialized in this function [-Wmaybe-uninitialized] fprintf( fout, "%c 0\n", v[z]); ~~~^