Compilare: user.cpp: In function ‘void ssq()’: user.cpp:93:15: warning: statement has no effect [-Wunused-value] for (j; j <= n*n && mat1d[j].val >= minVal; j++) ^ user.cpp: In function ‘void solve()’: user.cpp:103:14: warning: statement has no effect [-Wunused-value] for (step; (step<<1) <= MAXVAL; step <<= 1); ^ user.cpp:104:14: warning: statement has no effect [-Wunused-value] for (step; step; step >>= 1) { ^ user.cpp: In function ‘void citire()’: user.cpp:33:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &q); ^ user.cpp:36:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &a[i][j]); ^ user.cpp:38:79: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d", &stion[i].x1, &stion[i].y1, &stion[i].x2, &stion[i].y2); ^ user.cpp: In function ‘int main()’: user.cpp:119:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("matrice2.in", "r", stdin); ^ user.cpp:120:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("matrice2.out", "w", stdout); ^