Compilare: user.cpp: In function ‘int main()’: user.cpp:11:14: warning: unused variable ‘j1’ [-Wunused-variable] int n, i1, j1, i2, j2, i, j, maxim, minim; ^ user.cpp:13:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &n); ^ user.cpp:16:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &m[i][j]); ^