Preview:
void starPattern(int rows){
    for(int i=0; i<rows; i++){
        for(int j=0; j<=i; j++){
            printf("*");
        }
        printf("\n");
    }
}

void reverse_starPattern(int rows){
    for(int i=0; i<rows; i++){
        for(int j=0; j<=rows-i-1; j++){
            printf("*");
        }
        printf("\n");
    }
}

int main(){
    int rows;
    printf("number if rows\n");
    scanf("%d",&rows);
    starPattern(rows);
    reverse_starPattern(rows);
    return 0;
}
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