Compilare: user.cpp: In function ‘int main()’: user.cpp:25:31: warning: statement has no effect [-Wunused-value] for(i2; i2 >= 1 && ver == 1; i2--) ^ user.cpp:32:31: warning: statement has no effect [-Wunused-value] for(j2; j2 >= 1 && ver == 1; j2--) ^ user.cpp:13:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d", &N, &M); ^ user.cpp:16:41: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &ma[i][j]); ^ user.cpp:60:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &q); ^ user.cpp:62:39: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d", &i2, &j2); ^