3.2 printf

3.2 printf

3.2.1 输出一个字符串

#include <stdio.h>

int main(int argc, char *argv[])
{
        printf("hello world!");

        return 0;
}

3.2.2 输出一个整型变量

     #include <stdio.h>

     int main(int argc, char *argv[])
    {
            int i = 10;

            i = i + 1;
            printf("i = %d", i);

            return 0;
    }

3.2.3 将一个整数以16进制输出

    #include <stdio.h>

    int main(int argc, char *argv[])
    {
            int i = 100;

            printf("i = 0x%x", i);

            return 0;
    }

3.2.4 输出一个浮点型数

    #include <stdio.h>

    int main(int argc, char *argv[])
    {
            float i = 137.02;

            printf("i = %f", i);

            return 0;
    }