Compilare: user.cpp: In function ‘bool prefix(char*, char*, int, int)’: user.cpp:28:9: warning: unused variable ‘lg’ [-Wunused-variable] int lg=strlen(a+1); int i; ^ user.cpp: In function ‘void multimi1(int)’: user.cpp:53:18: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if (i>>j&1!=0) a[++nr1]=s[j]; ^ user.cpp: In function ‘int multimi2(int)’: user.cpp:87:18: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if (i>>j&1!=0) a[++nr1]=s[j+n]; ^ user.cpp:114:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:118:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("subsiruri2.in","r",stdin); ^ user.cpp:119:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("subsiruri2.out","w",stdout); ^ user.cpp:121:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n", &n); ^ user.cpp:122:12: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(s); ^ /tmp/ccxCaUjT.o: In function `main': user.cpp:(.text.startup+0x67): warning: the `gets' function is dangerous and should not be used.