In this tutorial, we will discuss the concept of the C code to generate a pascal triangle using 1 D arrays with user input
In this topic, we are going to learn how to write a program to print Pascal triangle patterns using a single dim array in the C programming language
Here, we use for, while, and do-while loops for printing pascal triangle
In this program, the user is asked to enter the number of rows and then it will show a pascal triangle number pattern using for loop in the C language
Program 1
#include <stdio.h> #include <stdlib.h> int main() { int arr[30],arr_Temp[30]; //declare two one dim arrays int i,j,k,l, rowNo; //declare variables printf("Enter the number of rows: "); scanf("%d",&rowNo); arr_Temp[0]=1; arr[0]=1; //initialize array elements for(j=0; j<rowNo; j++) printf(" "); printf(" 1\n"); for(i=1; i<rowNo; i++){ for(j=0; j<i; j++) printf(" "); for(k=1; k<=rowNo; k++){ arr[k]=arr_Temp[k-1]+arr_Temp[k]; } arr[i]=1; for(l=0; l<=i; l++){ printf("%3d",arr[l]); arr_Temp[l]=arr[l]; } printf("\n"); } getch(); return 0; }
When the above code is executed, it produces the following result
Enter the number of rows: 4
In this program, the user is asked to enter the number of rows and then it will show a pascal triangle number pattern using the while loop in the C language
Program 2
#include <stdio.h> #include <stdlib.h> int main() { int arr[30],arr_Temp[30]; //declare two one dim arrays int i,j,k,l, num_Row; //declare and initialize printf("Enter the numer of rows: "); scanf("%d",&num_Row); arr_Temp[0]=1; arr[0]=1; //initialize array elements j=0; while(j<num_Row){ printf(" "); j++; } printf(" 1\n"); i=1; while(i<num_Row){ j=0; while(j<i){ printf(" "); j++; } k=1; while(k<=num_Row){ arr[k]=arr_Temp[k-1]+arr_Temp[k]; k++; } arr[i]=1; l=0; while(l<=i){ printf("%3d",arr[l]); arr_Temp[l]=arr[l]; l++; } printf("\n"); i++; } getch(); return 0; }
When the above code is executed, it produces the following result
Enter the number of rows:5
In this program, the user is asked to enter the number of rows and then it will show a pascal triangle number pattern using the do-while loop in the C language
Program 3
#include <stdio.h> #include <stdlib.h> int main() { int arr[30],arrTemp[30]; //declare two one dim arrays int i,j,k,l, rowNo; //declare and initialize printf("Enter the value for the number of rows: "); scanf("%d",&rowNo); arrTemp[0]=1; arr[0]=1; //initialize array elements j=0; do{ printf(" "); j++; } while(j<rowNo); printf(" 1\n"); i=1; do{ for(j=0; j<i; j++) printf(" "); k=1; while(k<=rowNo){ arr[k]=arrTemp[k-1]+arrTemp[k]; k++; } arr[i]=1; l=0; do{ printf("%3d",arr[l]); arrTemp[l]=arr[l]; l++; } while(l<=i); printf("\n"); i++; }while(i<rowNo); getch(); return 0; }
When the above code is executed, it produces the following result
“Enter the value for the number of rows:4
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