1、實現(xiàn)一個字符串“how are you”的逆序輸出（編程語言不限）。如給定字符串為“hello world”,輸出結(jié)果應當為“world hello”。

- (void)charReverse
{
    NSString * string = @"hello,world";

    NSLog(@"%@",string);

    NSMutableString * reverString = [NSMutableString stringWithString:string];

    for (NSInteger i = 0; i < (string.length + 1)/2; i++) {

        [reverString replaceCharactersInRange:NSMakeRange(i, 1) withString:[string substringWithRange:NSMakeRange(string.length - i - 1, 1)]];

        [reverString replaceCharactersInRange:NSMakeRange(string.length - i - 1, 1) withString:[string substringWithRange:NSMakeRange(i, 1)]];
    }

    NSLog(@"reverString:%@",reverString);

    //C
    char ch[100];

    memcpy(ch, [string cStringUsingEncoding:NSUTF8StringEncoding], [string length]);

   //設置兩個指針，一個指向字符串開頭，一個指向字符串末尾
    char * begin = ch;

    char * end = ch + strlen(ch) - 1;

//遍歷字符數(shù)組，逐步交換兩個指針所指向的內(nèi)容，同時移動指針到對應的下個位置，直至begin>=end 
    while (begin < end) {

        char temp = *begin;

        *(begin++) = *end;

        *(end--) = temp;
    }

    NSLog(@"reverseChar[]:%s",ch);
}

    [cpp] view plain copy

    int spliterFunc(char *p) {

        char c[100][100];
        int i =0;
        int j =0;

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

        }
        for (int k = i; k >=0; k--) {
            printf("%s", c[k]);
            if (k >0) {
                printf(" ");
            } else {
                printf("\n");
            }
        }    return0;

    }