程序查找前n个自然数的总和。我们将看到计算自然数的总和的两个 C 程序。在第一个 C 程序中,我们使用for循环查找总和,在第二个程序中,我们使用while循环执行相同操作。
要了解这些程序,您应该熟悉以下C 编程概念:
示例 1:使用for循环查找自然数之和的程序
用户输入n的值,程序使用for循环计算前n个自然数的总和。
#include <stdio.h>int main(){ int n, count, sum = 0; printf("Enter the value of n(positive integer): "); scanf("%d",&n); for(count=1; count <= n; count++) { sum = sum + count; } printf("Sum of first %d natural numbers is: %d",n, sum); return 0;}输出:
Enter the value of n(positive integer): 6Sum of first 6 natural numbers is: 21
示例 2:使用while循环查找自然数的总和
#include <stdio.h>int main(){ int n, count, sum = 0; printf("Enter the value of n(positive integer): "); scanf("%d",&n); /* When you use while loop, you have to initialize the * loop counter variable before the loop and increment * or decrement it inside the body of loop like we did * for the variable "count" */ count=1; while(count <= n){ sum = sum + count; count++; } printf("Sum of first %d natural numbers is: %d",n, sum); return 0;}输出:
Enter the value of n(positive integer): 7Sum of first 7 natural numbers is: 28
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