Primjeri programa u C – u

double funkcija (double x);
main() {
double x,h, izv1, izv2, rel, aps,f;
printf (“Unijeti xn”);
scanf (“%f”,&x);
h=0.1;
while (h>0.00000001) {
izv1=(funkcija(x+h)-funkcija(x))/h;
izv2=exp(x)*cos(x)-exp(x)*sin(x);
aps=fabs(izv2-izv1);
rel=fabs(aps/izv2)*100;
printf (“%f %f %f n”, h, aps, rel);
h=h*0.9;
}
return (0);
}

double funkcija (double x) {
double f;
f=exp(x)*cos(x);
return (f);
}

2.# include <stdio.h>
# include <math.h>

main() {
int i,j,n,a[9][9],b[9][9],c[9][9],d[9][9],sk1,srn,trag,k,s1,s2;
printf (“Unesi dimenzije matricen”);
scanf (“%d”,&n);
printf (“Unesi elemente matrice n”);
for (i=0;i<n;i++) {
for (j=0;j<n;j++) {
scanf (“%d”,&a[i][j]);
}
}
for (i=0;i<n;i++) {
for (j=0;j<n;j++) {
printf (“%d “,a[i][j]);
}
printf (“n”);
}
sk1=0;
for (i=0;i<n;i++){
sk1=sk1+a[i][0];
}
printf (“suma elemenata prve kolone je: %d n”, sk1);
srn=0;
for (i=0;i<n;i++){
srn=srn+a[n-1][i];
}
printf (“suma elemenata n-tog reda je: %d n”, srn);
trag=0;
for (i=0;i<n;i++){
trag=trag+a[i][i];
}
printf (“trag matrice je: %d n”, trag);
printf (“transponovana matrican”);
for (i=0; i<n; i++) {
for (j=0; j<n; j++) {
b[i][j]=a[j][i];
printf (“%d “, b[i][j]);
}
printf (“n”);
}
for (i=0; i<n; i++) {
for (j=0; j<n; j++) {
c[i][j]=a[i][j]+b[i][j];
}
}
printf (“suma matrice A i njene transponovane ATn”);
for (i=0;i<n;i++) {
for (j=0;j<n;j++) {
printf (“%d “,c[i][j]);
}
printf (“n”);
}
for (i=0; i<n; i++) {
for (j=0; j<n; j++) {
d[i][j]=0;
for (k=0; k<n; k++) {
d[i][j]+=a[i][k]*b[k][j];
}
}
}
printf (“proizvod matrica A i ATn”);
for (i=0;i<n;i++) {
for (j=0;j<n;j++) {
printf (“%d “,d[i][j]);
}
printf(“n”);
}
s1=0;
for (i=0; i<n; i++) {
for (j=i+1; j<n; j++) {
s1+=a[i][j];
}
}
printf (“suma elemenata iznad glavne dijagonale je: %d n”, s1);
s2=0;
for (i=0; i<n; i++) {
for (j=0; j<i; j++) {
s2+=a[i][j];
}
}
printf (“suma elemenata ispod glavne dijagonale je: %d n”, s2);
return(0);
}