Compilare: user.cpp: In function ‘int main()’: user.cpp:21:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (l=2;l<strlen(s)-1;l++) ^ user.cpp:25:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while ((i<strlen(s)-1)&&(ok==1)) ^ user.cpp:17:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%ld",&p); ^ user.cpp:20:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%ld",&p); fscanf(f,"%s",s); ^ user.cpp:20:45: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%ld",&p); fscanf(f,"%s",s); ^ user.cpp:41:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%c%c%c",&t,&t,&c); ^