c语言问题

#include #include void f1(char *c1, char *c2){ char p = *c1; *c1 = *c2; *c2 = p;}int main(){ int i = 0, j = 0; char str[80] = {'\0'}; char *pleft, *pright; printf("输入字符串："); gets(str); i = 0; j