使用 topper 函数

Question

    #include <stdio.h>
    #include <stdlib.h>
    #include <time.h>
    #include <string.h>
    #include <ctype.h>
    #define SIZE 5

    void select_word(const char *const art[],  const char *const noun[],
                           const char *const verb[], const char *const prep[]);

    void build_sentence(const char *const sentence[]);

    int main()
    {
       int i;
       const char *art [SIZE] = { "the", "a", "one", "some", "any",};
       const char *noun[SIZE] = { "boy", "girl", "dog", "town", "car",};
       const char *verb[SIZE] = { "drove","jumped", "ran", "walked", "skipped",};
       const char *prep[SIZE] = { "to", "from", "over", "under", "on",};
       srand(time(0));
       for(i=0; i<3; i++)
       select_word( art, noun, verb, prep );
       return 0;
    }

    void select_word(const char *const art[],  const char *const noun[],
                           const char *const verb[], const char *const prep[])
    {
           const char *sentence [6] = {

                  art  [rand() % SIZE],
                  noun [rand() % SIZE],
                  verb [rand() % SIZE],
                  prep [rand() % SIZE],
                  art  [rand() % SIZE],
                  noun [rand() % SIZE]};

                  build_sentence(sentence);
       }

       void build_sentence (const char *const sentence[]) {
                          printf( "%s %s %s %s %s %s. \n",
                            sentence [0],

/* 我正在尝试使用 'toupper' 函数使随机生成的句子中的第一个单词成为大写。我想我在句子 [0] 和句子 [1] 之间放了一个 printf 函数 */

                            sentence [1], 
                            sentence [2],
                            sentence [3],
                            sentence [4],
                            sentence [5]);
                        }

Answer 1

您将无法就地使用它来处理字符串的问题，因为它们是常量。您将需要为结果使用一些可写存储。如果你不想，你可以只将第一个单词的第一个字符大写，然后在 printf:

中以第二个字符开始写第一个单词

printf( "%c%s %s %s %s %s %s. \n",
                            toupper(sentence[0][0]), 
                            &sentence[0][1], 
                            sentence[1],
                            ..........

使用 topper 函数

Using toupper function

c

string

pointers

toupper