use c to write a program to print out the following pattern. * ** *** **** *****

以下是用C语言编写的程序，用于打印出上述图案：

#include <stdio.h>

int main() {
    int i, j;
    for (i = 1; i <= 5; i++) {
        for (j = 1; j <= i; j++) {
            printf("*");
        }
        printf("\n");
    }
    return 0;
}