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#include<stdio.h> int main() {void choose(char s[100]);char str[100];printf("请输入一段字符:"); gets(str);printf("nn");choose(str);return 0; }void choose(char s[100]) {char c;int i,j,num=0,start=0;for(i=0,j=0;i<100;i++){c=s[i];if((c!=' ')&&(c!='