C語言中求兩個整型的平均值（保留浮點數）

 

1、

#include <stdio.h>

int main(void) { int a, b; puts("please input two integer."); printf("a = "); scanf("%d", &a); printf("b = "); scanf("%d", &b); printf("(a + b) / 2 = %d\n", (a + b) / 2); return 0; }

 

 ↓

#include <stdio.h>

int main(void) { int a, b; puts("please input two integer."); printf("a = "); scanf("%d", &a); printf("b = "); scanf("%d", &b); printf("(a + b) / 2 = %f\n", (a + b) / 2); return 0; }

 

 ↓

#include <stdio.h>

int main(void) { int a, b; puts("please input two integer."); printf("a = "); scanf("%d", &a); printf("b = "); scanf("%d", &b); printf("(a + b) / 2 = %f\n", (a + b) / 2.0); return 0; }

 

 ↓

#include <stdio.h>

int main(void) { int a, b; puts("please input two integer."); printf("a = "); scanf("%d", &a); printf("b = "); scanf("%d", &b); printf("(a + b) / 2 = %f\n", (double)(a + b) / 2); return 0; }