Compilare: user.cpp: In function ‘int solve(int)’: user.cpp:23:23: warning: unused variable ‘cost’ [-Wunused-variable] int I, J, iv, jv, cost; ^ user.cpp: In function ‘int main()’: user.cpp:65:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &op ); ^ user.cpp:67:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d%d", &N, &G ); ^ user.cpp:70:46: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &A[i][j] ); ^ user.cpp:74:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &N ); ^ user.cpp:77:46: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &A[i][j] ); ^