2021-08-10

#include <stdlib.h>#include <stdio.h>#define N 20void fun( int a){ int i, x, n=0; x=rand()%20;/found/ while (n<N) { for(i=0; i<n; i++ )/found/ if( xa[i] ) break;/found/ if( in) { a[n]=x; n++; } x=rand()%20; }}void main(){ int x[N]={0} ,i; fun( x ); printf(“The result : \n”); for( i=0; i<N; i++ ) { printf("%4d",x[i]); if((i+1)%5==0)printf("\n"); } printf("\n\n");}42.#include <stdio.h>void fun(){ int a[3][3],sum; int i,j;/found/ sum=0; for (i=0;i<3;i++) { for (j=0;j<3;j++)/found*/ scanf("%d",&a[i][j]); } for(i=0;i<3;i++) sum=sum+a[i][i]; printf(“Sum=%d\n”,sum);}void main(){fun();}43.#include <stdio.h>#include <conio.h>#include <stdlib.h>void fun (int array[3][3]){ int i,j,n; for(i=0;i<3;i++) { for(j=i+1;j<3;j++) { n=array[i][j]; array[i][j]=array[j][i]; array[j][i]=n; } }}void main(){ FILE wf; int i,j; int array [3][3]={{100,200,300},{400,500,600},{700,800,900}}; system(“CLS”); for (i=0;i<3;i++) {for (j=0;j<3;j++) printf("%7d “,array[i][j]); printf(”\n "); } fun(array); printf("Converted array:\n “); for (i=0;i<3;i++) { for (j=0;j<3;j++) printf(”%7d “,array[i][j]); printf(”\n "); } // wf=fopen(“out.dat”,“w”); for (i=0;i<3;i++) { for (j=0;j<3;j++) fprintf(wf,"%7d “,array[i][j]); fprintf(wf,”\n"); } fclose(wf);//}