1、
#include <stdio.h>
int main(void) { int i, j, len; puts("please input the len."); printf("len = "); scanf("%d", &len); for (i = 1; i <= len; i ++ ) { for (j = 1; j <= i; j ++ ) { putchar('*'); } putchar('\n'); } return 0; }
2、
#include <stdio.h>
int main(void) { int i, j, len; puts("please input the len."); printf("len = "); scanf("%d", &len); for (i = 1; i <= len; i ++) { for (j = 1; j <= len; j ++) { if (j > (len - i)) putchar('*'); else putchar(' '); } putchar('\n'); } return 0; }
↓
#include <stdio.h>
int main(void) { int i, j, len; puts("please input an integer."); printf("len = "); scanf("%d", &len); for (i = 1; i <= len; i ++ ) { for (j = 1; j <= (len -i); j ++ ) { putchar(' '); } for (j = 1; j <= i; j ++) { putchar('*'); } putchar('\n'); } return 0; }
3、
#include <stdio.h>
int main(void) { int i, j, len; puts("please input the len."); printf("len = "); scanf("%d", &len); for (i = 1; i <= len; i ++ ) { for (j = 1; j <= len; j ++ ) { if (j <= (len - i + 1)) { putchar('*'); } } putchar('\n'); } return 0; }
↓
#include <stdio.h>
int main(void) { int i, j, len; puts("please input the len."); printf("len = "); scanf("%d", &len); for (i = 1; i <= len; i ++ ) { for (j = 1; j <= (len - i + 1); j ++ ) { putchar('*'); } putchar('\n'); } return 0; }
4、
#include <stdio.h>
int main(void) { int i, j, len; puts("please input the len."); printf("len = "); scanf("%d", &len); for (i = 1; i <= len; i ++) { for (j = 1; j <= len; j ++) { if (j > (i - 1)) putchar('*'); else putchar(' '); } putchar('\n'); } return 0; }
↓
#include <stdio.h>
int main(void) { int i, j, len; puts("please input the len."); printf("len = "); scanf("%d", &len); for (i = 1; i <= len; i ++ ) { for (j = 1; j < i; j ++ ) { putchar(' '); } for (j = 1; j <= (len + 1 - i); j ++) { putchar('*'); } putchar('\n'); } return 0; }
