【实例】分别输出整数、浮点数和字符串。

#include<stdio.h>
int main(void)
{
    int a=1;
    float b=5.0;
    char str[100]= "";
    scanf("%c %c %c",&a,&b,str);
    /*分别演示 整数*/
    printf("int is:%d\n",a);
    /*分别演示 浮点数*/
    printf("float is:%f\n",b);
    /*分别演示 字符串*/
    printf("char is:%s\n",str);
   
    return 0;
}

输出结果：
【运行结果】
1 4.4 fs
int is:1
float is:4.400000
char is:fs

例子首先是等待用户输入整数浮点数和一个字符串，然后调用函数printf()按照对应的格式输出。

又如，输出更多格式的数据。

#include <stdio.h>

int main()
{
    printf ("Characters: %c %c \n", 'a', 65);
    printf ("Decimals: %d %ld\n", 1977, 650000L);
    printf ("Preceding with blanks: %10d \n", 1977);
    printf ("Preceding with zeros: %010d \n", 1977);
    printf ("Some different radices: %d %x %o %#x %#o \n", 100, 100, 100, 100, 100);
    printf ("floats: %4.2f %+.0e %E \n", 3.1416, 3.1416, 3.1416);
    printf ("Width trick: %*d \n", 5, 10);
    printf ("%s \n", "A string");
    return 0;
}

输出结果：
Characters: a A
Decimals: 1977 650000
Preceding with blanks: 1977
Preceding with zeros: 0000001977
Some different radices: 100 64 144 0x64 0144
floats: 3.14 +3e+000 3.141600E+000
Width trick: 10
A string