整数的输入输出

两种形式输出：（以int为界）

1. char、short、int都用 %d
2. long 和long long都用 %ld

• %d char、short、int
• %ld long long long
• %u unsignde
• %lu unsignde long long
  整数的格式化输出示例

#include <stdio.h>
int main(){char a = -1;int b = -1;printf("char a = %d\n int b = %d\n",a,b);
}

输出为：char a = -1
int b = -1
当以%u输出时，结果就时umsignde int所能表示的最大数

#include <stdio.h>
int main(){char a = -1;int b = -1;printf("char a = %u\n int b = %u\n",a,b);
}

输出为：char a = 4294967295
int b = 4294967295

8进制和16进制

#include <stdio.h>
int main(){int a = 012; //字面量以0开头为8进制char b = 0x12;  //字面量以0x开头为16进制printf("a=%d,b=%d",a,b);    //以十进制输出}

输出为：a=10,b=18