union [union tag] { member definition; member definition; ... member definition; } [one or more union variables]; union Data { int i; float f; ]; } data; #include <stdio.h> #include <string.h> union Data { int i; float f; ]; }; int main( ) { u…
#include <stdio.h> int main() { , count = ; double mean; mean = (double) sum / count; printf("Value of mean : %f\n", mean ); } #include <stdio.h> int main() { ; char c = 'c'; /* ascii 值是 99 */ int sum; sum = i + c; printf("Value…
#include <stdio.h> int max(int x, int y) { return x > y ? x : y; } int main(void) { /* p 是函数指针 */ int (* p)(int, int) = & max; // &可以省略 int a, b, c, d; printf("请输入三个数字:"); scanf("%d %d %d", & a, & b, & c);…
#include <stdio.h> int main () { /* 局部变量声明 */ int a, b; int c; /* 实际初始化 */ a = ; b = ; c = a + b; printf ("value of a = %d, b = %d and c = %d\n", a, b, c); ; } #include <stdio.h> /* 全局变量声明 */ int g; int main () { /* 局部变量声明 */ int a,…
return_type function_name( parameter list ) { body of the function } /* 函数返回两个数中较大的那个数 */ int max(int num1, int num2) { /* 局部变量声明 */ int result; if (num1 > num2) result = num1; else result = num2; return result; } #include <stdio.h> /* 函数声明 */ in…
#include <stdio.h> int main() { ; ; int c ; c = a + b; printf("Line 1 - c 的值是 %d\n", c ); c = a - b; printf("Line 2 - c 的值是 %d\n", c ); c = a * b; printf("Line 3 - c 的值是 %d\n", c ); c = a / b; printf("Line 4 - c 的值…