考研C语言复习

 

#include <iostream>
#include <cstdio>
using namespace std;


int main()
{
    int a = 12, b = 34;
    double c = 2.23, d = 45.4;
    printf("m=%-4d n=%-4d q=%-6.2lf k=%-6.2lf\n", a, b, c, d); 
}

printf("%-6.2lf", c): “-6.2lf”：代表c左对齐，要输出6位，不足6位则在右部分补空格。(lf: 'l'是 L不是 1)