c語言中while循環限定次數的操作

 

1、

#include <stdio.h>

int main(void) { int i; puts("please input an integer."); printf("i = "); scanf("%d", &i); while (i > 0) { printf("hello world!\n"); i = i - 1; } printf("\n"); return 0; }

↓

#include <stdio.h>

int main(void) { int i; puts("please input an integer."); printf("i = "); scanf("%d", &i); while ( i-- > 0) { printf("hello world.\n"); } return 0; }

↓

#include <stdio.h>

int main(void) { int i; puts("please input an integer."); printf("i = "); scanf("%d", &i); while ( i-- ) { putchar('k'); } putchar('\n'); return 0; }