Compilare: main.cpp: In function 'int main()': main.cpp:78:19: warning: unused variable 'j' [-Wunused-variable] int n, m, k, i, j, u, u2, c, w, st, dr, mid, mindist, prev ; ^ main.cpp:78:48: warning: unused variable 'mindist' [-Wunused-variable] int n, m, k, i, j, u, u2, c, w, st, dr, mid, mindist, prev ; ^~~~~~~ main.cpp:79:35: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d%d\n", &n, &k ) ; ^ main.cpp:81:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%c ", &viz[i]) ; ^ main.cpp:84:27: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d", &m ) ; ^ main.cpp:86:48: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d%d%d%d", &u, &u2, &c, &w ) ; ^