编写一个C语言程序，关于“统计一条英文句子中字母的个数，在主程序中实现输入输出”

句子【I am your father】有单词4个 。Press any key to continue #include "stdio.h" #include "string.h" int main() { int i,j,k=0,len,mark=0,count=0; char str[]="I am your father"; len = strlen(str); for (i=0;i<len;i+