Compilare: user.cpp: In function ‘int verif(char*, char*)’: user.cpp:12:9: warning: variable ‘la’ set but not used [-Wunused-but-set-variable] int la,lb,i,j=0; ^ user.cpp: In function ‘int main()’: user.cpp:29:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(strlen(a)>mx) {mx=strlen(a); strcpy(b,a);} ^ user.cpp:30:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if(strlen(a)==mx) { ^ user.cpp:24:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&p,&n); ^ user.cpp:28:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%s",a); ^ user.cpp:38:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%s",a); ^