printf

int a = 1;

long b = 1234567890;

float c = 1.56;

double d = 1234567.343;

int e = 12;

char ch = 'a'; //字符

char chs[] = "abc";//字符串 ,因为c语言中没有字符串这种数据类型，只有char字符类型，在C语言中所谓的字符串其实是char数组，数组最后一个元素加上“\0"，表示字符串结束，这是一种字符串的表达方式。

printf("%d", a);

printf("%ld", b);

printf("%f", c);

printf("%lf", d);

printf("%0", e); //8进制

printf("%0X", e); //16进制

printf("%#0X", e); //16进制 带0X

printf("%0x", e); //16进制

printf("%#0x", e); //16进制 带0x

printf("%c", ch);

printf("%s", chs);

scanf

#include
    
        #include
     
      int main(int argc,char**argv) {    printf("Hello,Linux.\n");    int a = 1 * 2;    int b = 012;    int c = 0x12;    char d[] = "abc";    printf("%i\n",a);    printf("%d\n",b);    printf("%d\n",c);    printf("%s\n",d);    char i[12];    scanf("%s", &i);    printf("您输入了一个字符串：%s\n", i);    char ch;    while((ch=getchar()) != '\n') {            continue;    }    int e;    scanf("ok%d", &e);    printf("e = %d\n", e);    while((ch=getchar()) != '\n') {            continue;    }    int j, k;    scanf("%d %d", &j, &k);    printf("j = %d, k = %d\n", j, k);    return 0;}