Compilare: user.cpp: In function ‘void calcul()’: user.cpp:36:9: warning: unused variable ‘i’ [-Wunused-variable] int i, j; ^ user.cpp:36:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j; ^ user.cpp:38:42: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d %d %d", &I0, &I1, &I2); ^ user.cpp:39:39: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d %d %d", &A, &B, &C); ^ user.cpp:40:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &N); ^ user.cpp: In function ‘int main()’: user.cpp:71:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &T); ^