Compilare: main.cpp: In function 'int main()': main.cpp:15:19: warning: format '%s' expects argument of type 'char*', but argument 2 has type 'char (*)[256]' [-Wformat=] {scanf("%s",&v); ^ main.cpp:9:13: warning: unused variable 'sum' [-Wunused-variable] int i,n,k,j,sum,pp2,nr2,nr3,x2; ^~~ main.cpp:7:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("ecuatii2.in","r",stdin); ^ main.cpp:8:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("ecuatii2.out","w",stdout); ^ main.cpp:13:15: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ main.cpp:15:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] {scanf("%s",&v); ^