输入一个字符串，统计其中最长的单词并输出。 #include <stdio.h> int findLongest( char str[] ); int main() { char sArr[100] = { 0 }; int loc, i; gets(sArr); loc = findLongest(sArr) ; for (i = loc; sArr[i] != ' ' && sArr[i] != '\0'; i++) putchar(sArr[i]); return 0; } int findLongest( char str[] ) { int i = 0, Loc = 0, len = 0, lLoc = 0; while (str[i] != '\0') { while (str[i] == ' ') i++; lLoc = i; while (str[i] != ' ' && str[i] != '\0') ; if (i -lLoc > len) { ; Loc = lLoc; } } ; } ###输入样例 This is a C Program ###输出样例 Program

输出样例应该是 "Program" 而不是 "Program "，最后的空格不应该输出。另外，findLongest函数中缺少返回值，需要将最长单词的起始位置Loc返回给主函数。下面是修改后的代码：

#include <stdio.h> 

int findLongest(char str[]);

int main()
{
    char sArr[100] = {0};
    int loc, i;

    gets(sArr);

    loc = findLongest(sArr);

    for (i = loc; sArr[i] != ' ' && sArr[i] != '\0'; i++)
        putchar(sArr[i]);

    return 0;
}

int findLongest(char str[])
{
    int i = 0, Loc = 0, len = 0, lLoc = 0;
    while (str[i] != '\0')
    {
        while (str[i] == ' ')
            i++;
        lLoc = i;
        while (str[i] != ' ' && str[i] != '\0')
            i++;
        if (i - lLoc > len)
        {
            len = i - lLoc;
            Loc = lLoc;
        }
    }
    return Loc;
}