#include <stdio.h>
int main(){
int age = 18;
float height = 1.85;
char unit = 'm';
printf("小明今年%d岁\n", age);
printf("小明身高%f%c\n", height, unit);
printf(%s,"小明现在在慕课网上学习IT技术");
return 0;
}
int main（）后面的{}要重新空一排
printf("小明今年18岁%d\n", age);
printf("小明身高1.850000m%f\n", height, unit);