新行开头的空格 - printf c

时间:2014-10-15 17:35:07

标签: c

我正在用C编写一个程序,逐行(-L)和逐字(-W)反转文本。逐行功能工作正常,但是当我使用逐字逐句的代码时,我在所有新行的开头都得到空格,奇怪的部分是空格取代字符串或字符。

我原本认为这是一个缓冲问题,但冲洗似乎没有任何影响。

应输出:

line3
line2
line1

输出:

line3
 ine2
 ine1

应输出:

789 456 123 line3
789 456 123 line2
789 456 123 line1

输出:

789 456 123 line3
 456 123 line2
 456 123 line1

这是我的代码:

char * getLine(char * line, int  * sizeString){
    char in;
    char * temp;       

    int i = 0;
    while((in = getchar()) != '\n' && in != EOF){
        if(i > *sizeString){
            temp = line;
            *sizeString *=10;
            line = (char *)malloc(*sizeString * sizeof(char));
            strncpy(line,temp,*sizeString);
            free(temp);
        }
        line[i++] = in;
    }
    line[i] = '\0';



    return line;
}

void reverseWords(char * line)
{
    char * token;
    const char s[1] = " ";
    char * wordArray[25] = {NULL};
    int wordCount = 0;
    //pulling the first substring out
    token= strtok(line, " ");

    /* walk through other tokens */
    while( token != NULL ) 
    {
      //printf( "%s ", token );
      wordArray[wordCount]=token;
      token = strtok(NULL, s);
      wordCount++;
    }
    //printf("\n");
    wordCount--;
    while(wordCount>=0)
    {
        printf("%s ", wordArray[wordCount]);
        wordCount--;
    }
    printf("\n");
}

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

    int sizeString = 10;
        char * lines[1024] = {NULL};
        char ** linePtr;

        linePtr = lines;

        if (!strcmp(argv[1],"-W"))
        {
            while(!feof(stdin)) 
            {
                *linePtr = (char *)malloc(sizeString * sizeof(char));
                *linePtr =  getLine( *linePtr, &sizeString);
                *linePtr++;
            }

            linePtr--;
            while(linePtr>=lines)
            {
                reverseWords(*linePtr);
                //printf("%s\n",*linePtr);
                linePtr--;
            }

            return 0;

        }

        if (!strcmp(argv[1],"-L"))
        {

            while(!feof(stdin)) 
            {
                *linePtr = (char *)malloc(sizeString * sizeof(char));
                *linePtr =  getLine( *linePtr, &sizeString);
                *linePtr++;
            }

            linePtr--;
            while(linePtr>=lines)
            {
                printf("%s\n",*linePtr);
                linePtr--;
            }

            return 0;
        }

}

0 个答案:

没有答案
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