1.

#include<stdlib.h>

#include<stdio.h>

void main(){

char students[ ]{67,78,89,43,92,100 };

int length=sizeof (students)/sizeof(char); //数组长度公式

int l_sum=0;

float l_average=0;

for(size_t i=0; i<lenght:i++)

{

l_sum=l_sum+students[i];

}

l-average=l_sum/lenght;

printf("总成绩=%d分\n 平均分：%.1f\n",l_sum,l_average);

system("pause");

}

2.

#include<stdio.h>

#include<stdlib.h>

void main(){

int l_a=67;

int l_b=78;

int l_c=89

int l_d=43;

int l_e=92;

float l_sum=l_a+l_b+l_c+l_d+l_e;

float l_average=l_sum/5;

printf("总成绩=%d分\n 平均分：%.1f\n",l_sum,l_average);

system("pause");

}

C语言 数组