int float string按宽度精度输出

 1 #include <stdio.h>
 2
 3 int main(void)
 4 {
 5     int a = 99;
 6     float b = 9.9;
 7     char c[] = "hello";
 8
 9     printf("*%010d*\n", a);
10     printf("*%10.3d*\n", a);
11     printf("*%-10.3d*\n", a);
12     printf("*%010.3d*\n", a);
13     printf("*%-010.3d*\n", a);
14     printf("------------\n");
15     printf("*%010f*\n", b);
16     printf("*%10.3f*\n", b);
17     printf("*%-10.3f*\n", b);
18     printf("*%010.3f*\n", b);
19     printf("*%-010.3f*\n", b);
20     printf("------------\n");
21     printf("*%010s*\n", c);
22     printf("*%10.3s*\n", c);
23     printf("*%-10.3s*\n", c);
24     printf("*%010.3s*\n", c);
25     printf("*%-010.3s*\n", c);
26
27     return 0;
28 }

如果0标志和精度说明符在字符串和整数输出中同时出现，那么0标志就会被忽略，但浮点数输出仍会显示

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