求1, 4, 7 , 10, 13, …, 且末项不大于100 的各项之和。
方法一:
1 2 3 4 5 6 7 8 9 10 11 12 | #include <stdio.h> int main() { int s = 0; int i; for (i = 1; i <= 100; i += 3) { s += i; } printf("The sum of each number is: %d\n", s); return 0; } |
方法二:
1 2 3 4 5 6 7 8 9 10 11 12 13 | #include <stdio.h> int main() { int s = 0; int i; while (i <= 100) { s += i; i += 3; } printf("The sum of each number is: %d\n", s); return 0; } |