25개 이상의 토픽을 선택하실 수 없습니다.
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
30 lines
398 B
30 lines
398 B
#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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char * buf;
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int sum_to_n(int num)
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{
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int i,sum=0;
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for(i=1;i<=num;i++)
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sum+=i;
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return sum;
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}
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void printSum()
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{
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char line[10];
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printf("enter a number:\n");
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fgets(line, 10, stdin);
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if(line != NULL)
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strtok(line, "\n");
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sprintf(buf,"sum=%d",sum_to_n(atoi(line)));
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printf("%s\n",buf);
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}
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int main(void)
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{
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printSum();
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return 0;
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}
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