can anybody help me how to perform unit testing of the below c program

i)While getting integer input it must get only integers

ii)While getting string input it must get only string

Matrix multiplication:

Code:#include<stdio.h> #include<conio.h> int main() { int choice,m1[10][10],i,j,k,m2[10][10],mult[10][10],r1,c1,r2,c2; do { printf("Enter number of rows and columns of first matrix \n"); scanf("%d%d",&r1,&c1); printf("Enter number of rows and columns of second matrix \n"); scanf("%d%d",&r2,&c2); if(r2==c1) { printf("Enter the elements of First matrix \n"); printf("Row wise\n"); for(i=0;i<r1;i++) for(j=0;j<c1;j++) scanf("%d",&m1[i][j]); printf("First Matrix is :\n"); for(i=0;i<r1;i++) { for(j=0;j<c1;j++) printf("%d\t",m1[i][j]); printf("\n"); } printf("Enter the elements of Second matrix \n"); printf("Row wise\n"); for(i=0;i<r2;i++) for(j=0;j<c2;j++) scanf("%d",&m2[i][j]); printf("Second Matrix is:\n"); for(i=0;i<r2;i++) { for(j=0;j<c2;j++) printf("%d\t",m2[i][j]); printf("\n"); } printf("Multiplication of the Matrices:\n"); for(i=0;i<r1;i++) { for(j=0;j<c2;j++) { mult[i][j]=0; for(k=0;k<r1;k++) mult[i][j]+=m1[i][k]*m2[k][j]; printf("%d\t",mult[i][j]); } printf("\n"); } } else { printf("Matrix multiplication not posssible"); } printf("\n\nPress 1/0 to continue or exit: "); scanf("%d",&choice); }while(choice==1); getch(); return 0; }