Compilare: main.cpp: In function 'void rez()': main.cpp:68:13: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses] while(x < m-1 & y < m-1) ~~^~~~~ main.cpp:51:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &m); ^ main.cpp:61:35: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%lf", &a[i][j]); ^ main.cpp: In function 'int main()': main.cpp:123:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("gauss.in", "r", stdin); ^ main.cpp:124:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("gauss.out", "w", stdout); ^