Compilare: user.cpp: In function ‘void update(int, int, int)’: user.cpp:16:10: warning: statement has no effect [-Wunused-value] for(pos; pos<=n; pos+=zero(pos)) ^ user.cpp: In function ‘int sum(int)’: user.cpp:22:10: warning: statement has no effect [-Wunused-value] for(pos; pos>0; pos-=zero(pos)) ^ user.cpp: In function ‘int main()’: user.cpp:37:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%d", &n, &m, &q); ^ user.cpp:40:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &mat[i][j]); ^ user.cpp:52:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, " %c", &ch); ^ user.cpp:54:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &pas); ^ user.cpp:63:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &pas); ^