1000

Input

Each line will contain two integers A and B. Process to end of file.

Output

For each case, output A + B in one line.

Sample Input

1 1

Sample Output

2

要点：注意审题，EOF。

#include <stdio.h>
int main(){
    int a, b;
    while(scanf("%d%d",&a,&b)!=EOF){
        printf("%d\n",a+b);
    }
    return 0;
}

1089

Input

The input will consist of a series of pairs of integers a and b, separated by a space, one pair of integers per line. 

Output

For each pair of input integers a and b you should output the sum of a and b in one line, and with one line of output for each line in input. 

Sample Input

1 5

10 20

Sample Output

6

30

代码和1000一样。

1090

Input

Input contains an integer N in the first line, and then N lines follow. Each line consists of a pair of integers a and b, separated by a space, one pair of integers per line. 

Output

For each pair of input integers a and b you should output the sum of a and b in one line, and with one line of output for each line in input. 

Sample Input

2

1 5

10 20

Sample Output

6

30

要点：注意循环条件吧

#include <stdio.h>
int main(){
    int linenum;
    scanf("%d",&linenum);
    for(;linenum!=0;linenum--){
    int a,b;
    scanf("%d %d",&a,&b);
        printf("%d\n",a+b);
    }
    return 0;
}

1091

Input

Input contains multiple test cases. Each test case contains a pair of integers a and b, one pair of integers per line. A test case containing 0 0 terminates the input and this test case is not to be processed.

Output

For each pair of input integers a and b you should output the sum of a and b in one line, and with one line of output for each line in input. 

Sample Input

1 5

10 20

0 0

Sample Output

6

30

要点：||和&&的用法

#include <stdio.h>
int main(){
    int a,b;
    while((scanf("%d%d",&a,&b)!=EOF)&&(a!=0||b!=0)){
        printf("%d\n",a+b);	
    }
    return 0;
}

1095

代码与1089只差printf加一个\n

1001

Input

The input will consist of a series of integers n, one integer per line.

Output

For each case, output SUM(n) in one line, followed by a blank line. You may assume the result will be in the range of 32-bit signed integer.

Sample Input

1

100

Sample Output

1

5050

要点：1. 注意换行。2.注意循环

#include <stdio.h>
int main(){
    int a;
    int sum = 0;
    while(scanf("%d",&a)!=EOF){
	    printf("%d\n\n",sumer(a));	
	}
	return 0;
}
int sumer(int a){
	int adder = 1;
	int sum = 0;
	while(adder!=a+1){
		sum = sum+adder;
		adder++;
	}
	return sum;
}

1064

Input

The input will be twelve lines. Each line will contain the closing balance of his bank account for a particular month. Each number will be positive and displayed to the penny. No dollar sign will be included.

Output

The output will be a single number, the average (mean) of the closing balances for the twelve months. It will be rounded to the nearest penny, preceded immediately by a dollar sign, and followed by the end-of-line. There will be no other spaces or characters in the output.

Sample Input

100.00 489.12 12454.12 1234.10 823.05 109.20 5.27 1542.25 839.18 83.99 1295.01 1.75

Sample Output

$1581.42

#include <stdio.h>
int main(){
	int i;
	double sum=0.0;
	for(i=0;i<12;i++){
		double input;
		scanf("%lf",&input);
		sum = sum+input;
	}
	sum = sum/12.0;
	printf("$%.2f\n",sum);
	return 0;
}