Compilare: user.cpp: In function ‘int main()’: user.cpp:70:41: warning: format ‘%d’ expects argument of type ‘int*’, but argument 3 has type ‘char*’ [-Wformat=] fscanf(fin, "%d", &val[l][c]), cost[l][c] = -1; ^ user.cpp:67:82: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d %d %d %d %d", &n, &m, &start.l, &start.c, &stop.l, &stop.c); ^ user.cpp:70:59: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &val[l][c]), cost[l][c] = -1; ^