C++ (Cpp) isValidIntの例

コード例 #1

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ファイル: IntegerInput.cpp プロジェクト: T-Santos/InputUtils

/*
   This is the main function to call
*/
int getInt()
{
    std::string strInt;
    bool validInt = false;
    do{
        std::cout <<"Enter an integer: ";
        std::getline(std::cin, strInt);
        if (isValidInt(strInt))
        {
            //std::cout << "Valid int: " << strInt << std::endl;
            validInt = true;
        }
        else
        {
            std::cout << "Invalid input\n";
        }

    }while(!validInt);

    return toInt(strInt);
};

コード例 #2

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ファイル: ValueLib.cpp プロジェクト: shultays/ingenue

void scanValue()
{
	Value *v = valueBuff + nValueBuff;
	char buff[1024];
	gets(buff);
	if (isValidInt(buff))
	{
		v->type = INTEGER;
		nValueExtraBuff += sizeof(int);
		*((int*)v->extra) = (int)atoi(buff);
	}
	else if (isValidFloat(buff))
	{
		v->type = FLOAT;
		nValueExtraBuff += sizeof(float);
		*((float*)v->extra) = (float)atoi(buff);
	}
	else
	{
		v->type = STRING;
		v->extra = valueExtraBuff + nValueExtraBuff;
		nValueExtraBuff += sprintf((char*)v->extra, "%s", buff) + 1;
	}
}

コード例 #3

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ファイル: APIManager.cpp プロジェクト: crabyh/MiniSQL

//CHAR 类型的长度限制在interpreter部分实现
bool APIManager:: checkInsertType(string tableName, vector<string> insert)
{
    int tableIndex = catalogmanager.findTable(tableName);
    int attrType;
    int arrNum = catalogmanager.Vtable[tableIndex].attriNum;
    for(int i = 0; i< arrNum; ++i )
    {
        attrType = catalogmanager.Vtable[tableIndex].attributes[i].type;
        switch (attrType) {
            case INT: // int
                if (!isValidInt(insert[i])) {
                    return false;
                }
                break;
            case FLOAT: // float
                if (!isValidFloat(insert[i])) {
                    return false;
                }
            default:
                break;
        }
    }
    return true;
}

コード例 #4

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ファイル: grades.cpp プロジェクト: bbsxjy/DataStructrueImplement

int main(int argc, char * argv[]) {

    // gets the hash table size from the command line

    int hashSize = Table::HASH_SIZE;
    
    Table * grades;  // Table is dynamically allocated below, so we can call
    // different constructors depending on input from the user.
    
    if (argc > 1) {
        hashSize = atoi(argv[1]);  // atoi converts c-string to int
        
        if (hashSize < 1) {
            cout << "Command line argument (hashSize) must be a positive number"
            << endl;
            return 1;
        }
        
        grades = new Table(hashSize);
        
    }
    else {   // no command line args given -- use default table size
        grades = new Table();
    }
    
    
    grades->hashStats(cout);
    
    // add more code here
    // Reminder: use -> when calling Table methods, since grades is type Table*
    printCmdSummary();//print out command lines
    //initialize some data
    char c;
    string name;
    int score;
    bool isValid=true;
    //while isvalid it will keep going ask client to enter untill quit
    do{
        cout<<"\n Please enter the command shows above [i , c , l , r , p , s , h , t , q]: ";
        cin>>c;
        
        if(cin.fail()){//if cin fail promt fail info and quit
            cout<<"exit"<<endl;
            cout<<"ERROR: invalid command!"<<endl;
            isValid=false;
        }
        else{
            switch (c){//switch method provide client to choose
                case 'i':
                cout<<"You are now in the insert method: "<<endl;
                cout<<"here is the example: "<<endl;
                cout<<"---Name: James ---"<<endl;
                cout<<"---Score: 86   ---"<<endl;;
                do{
                    cout<<"Please enter name: "<<endl;
                    cin>>name;
                }while(isValidString(name)==false);//check valid or not
                do{
                    cout<<"Please enter score: "<<endl;
                    cin>>score;
                }while(isValidInt(score)==false);//check valid or not
                
                if(grades->insert(name,score)==true){//if no same key existed then record entry
                    cout<<"Entry recorded!"<<endl;
                }else{
                    cout<<"Entry has already existed, Nothing changes!"<<endl;
                }
                break;
                
                case 'c':
                cout<<"You are now in the change method: "<<endl;
                cout<<"here is the example: "<<endl;
                cout<<"---Name: James ---"<<endl;
                cout<<"---Score: 86   ---"<<endl;;
                do{
                    cout<<"Please enter name: "<<endl;
                    cin>>name;
                }while(isValidString(name)==false);
                do{
                    cout<<"Please enter new score: "<<endl;
                    cin>>score;
                }while(isValidInt(score)==false);
                if(grades->lookup(name)!=NULL){//if found
                    grades->remove(name);//remove
                    grades->insert(name,score);//then insert again
                    cout<<"Record changed!"<<endl;
                }else{
                    cout<<"No such entry"<<endl;
                }
                break;
                
                case 'l':
                cout<<"You are now in the lookup method: "<<endl;
                cout<<"here is the example: "<<endl;
                cout<<"---Name: James ---"<<endl;
                do{
                    cout<<"Please enter name you want to lookup: "<<endl;
                    cin>>name;
                }while(isValidString(name)==false);
                if(grades->lookup(name)!=NULL){//if found
                    int* address=grades->lookup(name);//assign address to it
                    cout<<"Record found!"<<endl;
                    cout<<"the address is :"<<address<<endl;
                }else{
                    cout<<"No such entry"<<endl;
                }
                break;
                
                case 'r':
                cout<<"You are now in the remove method: "<<endl;
                cout<<"here is the example: "<<endl;
                cout<<"---Name: James ---"<<endl;
                do{
                    cout<<"Please enter name: "<<endl;
                    cin>>name;
                }while(isValidString(name)==false);
                
                if(grades->remove(name)==true){//if found
                    cout<<"Entry removed!"<<endl;//target removed
                }else{
                    cout<<"No such entry!"<<endl;
                }
                break;
                
                case 'p':
                cout<<"You are now in the print method: "<<endl;
                cout<<"here is the table: "<<endl;
                if(grades->numEntries()==0){
                    cout<<"<empty>"<<endl;
                }else{
                    grades->printAll();//print out all the entries
                }
                break;
                
                case 's':
                cout<<"You are now in the size method: "<<endl;
                cout<<"here is the total number of entries: "<<endl;
                cout<<grades->numEntries();//print out entries numbers
                break;
                
                case 'h':
                cout<<"You are now in the help method: "<<endl;
                cout<<"here is the comands: "<<endl;
                printCmdSummary();//print summary
                break;
                
                case 't':
                cout<<"You are now in the stats method: "<<endl;
                cout<<"here is the stats of this table: "<<endl;
                grades->hashStats(cout);//print out hashstats
                break;
                
                case 'q':
                cout<<"quitting this program"<<endl;
                isValid=false;//end the loop and quit 
                break;

                default:
                cout<<"Invalid Command,Please try again."<<endl;
                break;
            }
        }
    }while(isValid);
    
    return 0;
}

コード例 #5

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ファイル: rangesort.c プロジェクト: jimbokroneus/OS-Projects

int main(int argc, char * argv[]){

  assert(sizeof(rec_t) == 100);

  //arguments  
  char * inFile;
  char * outFile;
  long highValue = -1;
  long lowValue = -1;
  rec_t input;
  int omitCount = 0;
  int withinRangeCount = 0;

  //check for the proper amount of parameters
  if(argc != 9){
	usage(argv[0]);
  }  

  // input params
  int c;
  opterr = 0;
  while ((c = getopt(argc, argv, "i:o:l:h:")) != -1) {
    switch (c) {
    case 'i':
      inFile = strdup(optarg);
      break;
    case 'o':
      outFile = strdup(optarg);
      break;
    case 'l':
	if(isValidInt(optarg)){
	  lowValue = atol(optarg);
	}	
      break;
    case 'h':
	if(isValidInt(optarg)){
          highValue = atol(optarg);
	}
      break;
    default:
      usage(argv[0]);
    }
  }

  //printf("Low: %lu \n", lowValue);
  //printf("High: %lu \n", highValue);
  //printf("Max: %u \n", UINT_MAX);

  //TODO
  //validate parameters
  if(lowValue > highValue || lowValue < 0 || highValue < 0 || highValue > UINT_MAX || lowValue > UINT_MAX){
	fprintf(stderr, "Error: Invalid range value\n");
	exit(1);
  }

  //open input file
  int fd  = open(inFile, O_RDONLY);
  if(fd < 0 ){
    fprintf(stderr, "Error: Cannot open file %s\n" ,inFile);
    exit(1);
  }

  //get input file size
  struct stat buf;
  fstat(fd, &buf);
  int sizeInFile = buf.st_size;
 
  rec_t *withinRange = malloc(sizeInFile);

  while(1){
    int rc = read(fd, &input, sizeof(rec_t));
    //check for EOF
    if(rc == 0)
      break;
    //Error Occured
    if(rc <0){
      fprintf(stderr,"Error: Something happened while reading the file");
      exit(1);
    }
    
    //check that key falls in the right range
    if(input.key < lowValue || input.key > highValue){
      omitCount++;
    }
    else{
 	//printf("Key: %d\n", input.key);
     withinRange[withinRangeCount] = input;
     withinRangeCount++;    
    }
 }

 //printf("Ommitted: %d\n", omitCount);
 //printf("Within Range: %d\n", withinRangeCount);

  //close input file
  close(fd);

  //sort the array - not fully tested, but it is sorting the array properly
  qsort(&withinRange[0], (long)withinRangeCount, sizeof(rec_t), compRec);

  //open output file
  fd = open(outFile, O_WRONLY|O_CREAT|O_TRUNC, S_IRWXU);
  if(fd < 0){
    fprintf(stderr, "Error: Cannot open file %s\n" ,outFile);
    exit(1);
  }

  //write to output file
  int i;
  for(i = 0; i < withinRangeCount; i++){
   // printf("Key[%d]: %d\n", i, withinRange[i].key);
    int rc = write(fd, &withinRange[i], sizeof(rec_t));
    if(rc != sizeof(rec_t)){
        fprintf(stderr, "Error: Cannot write to file %s\n" ,outFile);
	exit(1);
    }
  }

  //close output file
  //close(fd);

  printf("closed file, exiting with 0");
  return 0;
}

コード例 #6

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