program4_04.c

[C语言入门经典(第4版)]整本书的源码！值得推荐！全部是最简单的源码！

/* Program 4.4 Summing integers - compact version */
#include <stdio.h>

int main(void)
{
  long sum = 0L;                      /* Stores the sum of the integers      */
  int count = 0;                      /* The number of integers to be summed */

  /* Read the number of integers to be summed */
  printf("\nEnter the number of integers you want to sum: ");
  scanf(" %d", &count);

  /* Sum integers from 1 to count */
  for (int i = 1 ; i<= count ; sum += i++ );

  printf("\nTotal of the first %d numbers is %ld\n", count, sum);
  return 0;
}