Compilare: user.cpp: In function ‘int main()’: user.cpp:15:36: warning: unused variable ‘p3’ [-Wunused-variable] int val,i,v,p11=1,p22=1,p33=1,p3=722369,n1,n2,val1,val2,val3,val11,val22,val33; ^~ user.cpp:13:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("strmatch.in","r",stdin); ^ user.cpp:14:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("strmatch.out","w",stdout); ^ user.cpp:17:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",s1+1); ^ user.cpp:41:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",s2+1); ^ user.cpp:31:22: warning: ‘v’ may be used uninitialized in this function [-Wmaybe-uninitialized] val2=(val2+(v*p22)%p2)%p2; ~~^~~~~