Compilare: user.cpp: In function ‘int main()’: user.cpp:19:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(strlen(c[0])>lg) ^ user.cpp:25:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(strlen(c[0])==lg) ^ user.cpp:46:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(ii<strlen(c[i])&&jj<strlen(c[j])) ^ user.cpp:46:58: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(ii<strlen(c[i])&&jj<strlen(c[j])) ^ user.cpp:52:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(ii==strlen(c[i])) ^ user.cpp:13:28: 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:18:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%s",c[0]); ^ user.cpp:36:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%s",c[i]); ^