怎样把字符串中的空格符删除？、
分别用指针和数组完成。
例如str="I am yours!"
或者s[20]={"I am yours!"}

你是要把字符串输出还是保存在一变量中，输出的话很简答

#include <stdio.h>
int main()
{
    char *p="I am Chinese";
    char c;
    int i = 0;

    while((c = p[i++])!=0){
        putchar(c);
    }
}

以上是输出中去掉空格

#include <stdio.h>
int main()
{
    char *p="I am Chinese";
    char c;
    int i = 0;

    while((c = p[i++])!='\0'){
        if(c!=' ')
        putchar(c);
    }
}

#include <stdio.h>
int main()
{
    char s[20]="I am Chinese";
    char c;
    int i = 0;

    while((c = s[i++])!='\0'){
        if(c!=' ')
        putchar(c);
    }
}

把去掉空格符的字符串放到另一个变量

#include <stdio.h>

int main()
{
    char *p = "I am yours!";
    char str[20] = "I am yours!";
    char *q = str;

     while(*p != '\0')
    {
        if(*p == ' ')
        {
            p++;
            continue;
        }
        else
        {
            putchar(*p);
            p++;
        }
    }
    printf("\n");

    while(*q != '\0')
    {
        if(*q ==' ')
        {
            q++;
            continue;
        }
        else
        {
            putchar(*q);
            q++;
        }
    }
    printf("\n");

    return 0;

}

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这样写：

void remove_str_blank(const char *src, char *dst)
{
    char c;
    
    while (c = *src++)
        if (c != ' ')
            *dst++ = c;
    *dst = 0;
}

#include <stdio.h>

char *trim_all(char *s);
int main()
{
    char *str=" abcd efgh jkl ";
    char *p=NULL;
    p=trim_all(str);
    puts(p);
    return 0;
}
char *trim_all(char *s)
{
    char *p=s, *q=s;
    while(*p)
    {
        if ( *p != ' ' )
            *q++ = *p;
        p++;
    }
    *q=0;
    return s;
}