Compilare: user.cpp: In function ‘void intercls(int, int, int&)’: user.cpp:25:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (ii<strlen(a[x]) && jj<strlen(a[y]) && k!=strlen(a[x])) ^ user.cpp:25:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (ii<strlen(a[x]) && jj<strlen(a[y]) && k!=strlen(a[x])) ^ user.cpp:25:51: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (ii<strlen(a[x]) && jj<strlen(a[y]) && k!=strlen(a[x])) ^ user.cpp: In function ‘int main()’: user.cpp:46:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (strlen(v)>maxx) ^ user.cpp:52:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if (strlen(v)==maxx) ^ user.cpp:76:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (k==strlen(a[i])) ^ user.cpp:88:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (k==strlen(a[i])) ^ user.cpp:37:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("interesant.in","r",stdin); ^ user.cpp:38:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("interesant.out","w",stdout); ^ user.cpp:39:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&p,&n); ^ user.cpp:45:32: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(v,5001,stdin); ^ user.cpp:65:37: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(a[++m],5001,stdin); ^