Compilare: user.cpp: In function ‘int verif(char*, char*)’: user.cpp:14:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<strlen(b)&&j<strlen(a);i++) { ^ user.cpp:14:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<strlen(b)&&j<strlen(a);i++) { ^ user.cpp:15:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(a[j]!=b[i]&&j<strlen(a)) j++; ^ user.cpp:17:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i==strlen(b)) return 1; ^ user.cpp: In function ‘int main()’: user.cpp:28:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(strlen(a)>mx) {mx=strlen(a); strcpy(b,a);} ^ user.cpp:29:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if(strlen(a)==mx) { ^ user.cpp:23:27: 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:27:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%s",a); ^ user.cpp:37:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%s",a); ^