Compilare: main.cpp: In function 'void form()': main.cpp:42:9: warning: variable 'ok' set but not used [-Wunused-but-set-variable] int ok=1; ^~ main.cpp:17:33: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&a[i][j]); ^ main.cpp: In function 'int main()': main.cpp:110:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("summax.in","r",stdin); ^ main.cpp:111:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("summax.out","w",stdout); ^ main.cpp:112:46: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n%d %d %d",&cerinta,&n,&st,&dr); ^