VI Vezba

//1. ZADATAK
#include <stdio.h>
main()
{
    int a[100],i=0,j;
    float sr=0;
    FILE *f1;
    f1=fopen("brojevi.txt","r");
    while (!feof(f1))
    {
        fscanf(f1,"%d",&a[i]);
        i++;
    }
    fclose(f1);
    for (j=0;j<i;j++)
        sr=a[j]+sr;
    f1=fopen("brojevi.txt","a");
    fprintf(f1," %f",sr/j);
    fclose(f1);
}
//2. ZADATAK
#include <stdio.h>
#include <string.h>
main()
{
    FILE *f1;
    char a[100];
    int i=0,j;
    gets(a);
    f1=fopen("reci.txt","w");
    while (i<strlen(a) && a[i]!=0)
    {
        if (a[i]!=' ')
        {
            while (a[i]!=' ' && a[i]!=0)
            {
                fprintf(f1,"%c",a[i]);
                i++;
            }
            fprintf(f1,"\n");
        }
        i++;
    }
    fclose(f1);
}

//3. ZADATAK
#include <stdio.h>
main()
{
    char a[100];
    int i=0,k,br,j;
    gets(a);
    scanf("%d",&k);
    while (i<100 && a[i]!=0)
    {
        if ((a[i]>='a' && a[i]<='z' ) || (a[i]>='A' && a[i]<='Z'))
        {
            br=1;
            j=i+1;
            while (j<100 && a[j]!=0)
            {
                if (a[i]==a[j])
                {
                    br++;
                    a[j]='0';
                }
                j++;
            }
            if (br>=k)
                printf("%c\t",a[i]);
        }
        i++;
    }
}

//4. ZADATAK
#include <stdio.h>
#include <string.h>
main()
{
    char s[100],pom[100];
    int i,z;
    gets(s);
    for (i=0;i<100 && s[i]!=0;i++)
        if (s[i]==' ')
            z=i;
    strncpy(pom,&s[z+1],strlen(s)-z-1);
    pom[strlen(s)-z-1]=' ';
    pom[strlen(s)-z]='\0';
    strncat(pom,s,z);
    puts(pom);
}

//5. ZADATAK
#include <stdio.h>
#include <string.h>
main()
{
    char r[100],s[20];
    int i=0,br=0;
    gets(r);
    gets(s);
    if (strncmp(r,s,strlen(s))==0)
        br++;
    while (r[i]!=0)
    {
        if (r[i]==s[0] && r[i+strlen(s)]==' ' && r[i-1]==' ')
            if (!strncmp(&r[i],s,strlen(s)-1))
                br++;
        i++;
    }
    printf("%d",br);
}

//6. ZADATAK
#include <stdio.h>
main()
{
    FILE *f1;
    int vr=0,br=1,bin;
    f1=fopen("binarne-cifre.txt","r");
    while (!feof(f1))
    {
        fscanf(f1,"%d",&bin);
        vr=vr+bin*br;
        br=br*2;
    }
    printf("%d",vr);
}

//7. ZADATAK
#include <stdio.h>
#include <string.h>
main()
{
    char s[100],c[100];
    int p=0;
    FILE *f1;
    f1=fopen("tekst.txt","r");
    gets(s);
    while (!feof(f1))
    {
        fscanf(f1,"%s",c);
        if (!strcmp(s,c))
            p=1;
    }
    if (p)
        printf("POSTOJI");
    else
        printf("NE POSTOJI");
}

//8. ZADATAK
#include <stdio.h>
#include <string.h>
void nadovezi(char a[],char b[])
{
    int i,j=0;
    i=strlen(a);
    while (b[j]!=0)
    {
        a[i]=b[j];
        i++;
        j++;
    }
    a[i]='\0';
    return;
}
main()
{
    char s1[100],s2[100];
    gets(s1);
    gets(s2);
    nadovezi(s1,s2);
    puts(s1);
}

//9. ZADATAK
#include <stdio.h>
main()
{
    char s[100];
    int i=0;
    gets(s);
    while (s[i]!=0)
    {
        if (s[i]>='A' && s[i]<='Z')
            s[i]=s[i]+('a'-'A');
        i++;
    }
    puts(s);
}

//10. ZADATAK
#include <stdio.h>
#include <string.h>
main()
{
    FILE *f1,*f2;
    char s[100];
    int m;
    scanf("%d",&m);
    f1=fopen("recenice.txt","r");
    f2=fopen("sadrze.txt","w");
    while (!feof(f1))
    {
        fgets(s,100,f1);
        if (strlen(s)>m)
            fprintf(f2,"%s",s);
    }
    fclose(f1);
    fclose(f2);
}