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20174文件读

松鼠树屋 2022-03-12 阅读 77
#include <stdio.h>
#define Maxsize 100
int main(){
	FILE *f;
	f=fopen("data.txt","r");
	float a[Maxsize];
	int i=0;
	char ch;
	int n;
	while(fscanf(f,"%f",&a[i])!=EOF){
		i++;
		fscanf(f,"%c",&ch);
	}
	n=i;
	float max1,max2;
	if(a[0]>a[1]){
		max1=a[0];
		max2=a[1];
	}
	else{
		max1=a[1];
		max2=a[0];
	}
	for(i=0;i<n;i++){
		if(a[i]>max1){
			max2=max1;
			max1=a[i];
		}
		else if(a[i]>max2){
			max2=a[i];
		}
	}
	printf("%.2f",max2);
	fclose(f);
	return 0;
}
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