如何在C语言中逐字执行句子？

也许这属于代码检查站点？

您的方法对我来说似乎非常有效（除了我只调用一次strlen（words）并将结果保存在寄存器中）。

两个可能的错误如下所示：

wordend = strlen(words);

应该

wordend = strlen(words)-1;

和

for(j = wordstart ; j <= (wordend - wordstart) / 2 ; ++j) {

应该

for(j = wordstart ; j <= (wordend + wordstart) / 2 ; ++j) {

最终代码看起来像（带有一些额外的{}）：

    #include <stdio.h>    int main(int argc,char *argv[])    {        int i,j;        char words[]= "this is a test";        int L=strlen(words);        // Reverse each word        for(i = 0; i < L; ++i) {          int wordstart = -1;          int wordend = -1;          if(words[i] != ' '){ wordstart = i; for(j = wordstart; j < L; ++j) {   if(words[j] == ' ') {     wordend = j - 1;     break;   } } if(wordend == -1)   wordend = L-1; for(j = wordstart ; j <= (wordend + wordstart) / 2 ; ++j) {   char temp = words[j];   words[j] = words[wordend - (j - wordstart)];   words[wordend - (j - wordstart)] = temp; } i = wordend;          }        }        printf("reversed string is %s:",words);        return 0;       }