C学习第一式：对scanf()函数的学习

#include <stdio.h>

int main(int argc, char const *argv[])
{
int a,b=0,c;
float x,y;
char c1,c2;
//scanf("a=%d,b=%d",&a,&b);
//scanf("%2d%*2d%3d",&a,&b);
//scanf("%2d%*d",&a,&b);
scanf("%2d,%*d%d",&a,&b,&c);
scanf("%f,%e",&x,&y);
scanf("%c,%c",&c1,&c2);
printf("\n\n");
//printf("a=%d\tb=%d\tc=%d\n", a,b,c);
printf("a=%d\tb=%d\n", a,b);
printf("%.3f\t%.3f\n",x,y);
printf("%c\t%c\n",c1,c2);
return 0;
}

1.scanf(“a=%d,b=%d”,&a,&b);

2.scanf(“%2d%*2d%3d”,&a,&b);

%hd:为指定给a赋h位数
%*hd:指忽略h位数
%*d:忽略输入的数据，既跳过对应变量

给a赋2位数，省略输入的2位数，给b赋3位数

3.scanf(“%2d%*d”,&a,&b);

scanf("%2d%*d",&a,&b);
scanf("%f,%e",&x,&y);
scanf("%c,%c",&c1,&c2);
printf("a=%d\tb=%d\n", a,b);
printf("%.3f\t%.3f\n",x,y);
printf("%c\t%c\n",c1,c2);

4.scanf(“%2d,%*d%d”,&a,&b,&c);