己有一个字符串 s，目标子串d，统计d在s中出现的该数。部分代码己提供，请在此基础上补充完成程序。 int getstrnum(char *s.,char *d) { int num=0; char *t: t=d; for(;*s;s++) { //请补充完成程序 } return num; } int _tmain (int argc, _TCHAR* argv []) { char *s=“Guizhou University is the only key university in Guizhou prioritized to develop itself in line with the criteria of the 211 Project”; cher *d=“th”; printf"%d\n", setstrnum (s. d)) ; return 0; }

完成的代码如下：

#include <stdio.h>
#include <string.h>

int getstrnum(char *s, char *d) {
    int num = 0;
    char *t = d;
    int len = strlen(d);
    for (; *s; s++) {
        if (*s == *t) {
            t++;
            if (*t == '\0') {
                num++;
                t = d;
            }
        } else {
            t = d;
        }
    }
    return num;
}

int main() {
    char *s = "Guizhou University is the only key university in Guizhou prioritized to develop itself in line with the criteria of the 211 Project";
    char *d = "th";
    printf("%d\n", getstrnum(s, d));
    return 0;
}

解释：首先，我们需要定义两个指针s和t，分别指向字符串s和目标子串d的首字符，然后遍历字符串s，逐个字符进行比较。如果字符相同，指针t向后移动一位，如果指针t指向目标子串的结尾，则说明目标子串出现了一次，计数器num加1，同时指针t重新指向目标子串的首字符。如果字符不同，指针t重新指向目标子串的首字符。最后返回计数器num即可。