Conversion (Decimal,Binary,Hexa)

number_conversion.c

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

void main(){
    int x;
    printf("Press 1 for Dec to Bin \nPress 2 for Dec to Hexa \nPress 3 for Dec to Oct\n");
    printf("Press 4 for Bin to Dec \nPress 5 for Bin to Hexa \nPress 6 for Bin to Oct\n");
    printf("Press 7 for Oct to Dec \nPress 8 for Oct to Hexa \nPress 9 for Oct to Bin\n");
    printf("Press 10 for Hexa to Dec \nPress 11 for Hexa to Bin \nPress 12 for Hexa to Oct\n\n");
    scanf("%d",&x);

    switch(x){
    case 1:
        dec_bin();
        break;
    case 2:
        dec_hex();
        break;
    case 3:
        dec_oct();
        break;
    case 4:
        bin_dec();
        break;
    case 5:
        bin_hex();
        break;
    case 6:
        bin_oct();
        break;
    case 7:
        oct_dec();
        break;
    case 8:
        oct_hex();
        break;
    case 9:
        oct_bin();
        break;
    case 10:
        hex_dec();
        break;
    case 11:
        hex_bin();
        break;
    case 12:
        hex_oct();
        break;
    default:
        printf("INVALID");
    }

    printf("\n\n");
}

//decimal to binary
void dec_bin(){
    int dec,bin[100],i=0,rem,j;
    printf("Decimal: ");
    scanf("%d",&dec);
    while(dec!=0){
        rem=dec%2;
        bin[i]=rem;
        i++;
        dec=dec/2;
    }
    printf("Binary: ");
    for(j=i-1;j>=0;j--){
        printf("%d",bin[j]);
    }
}

//decimal to octal
void dec_oct(){
    int dec,rem,i=0,oct[100],j;
    printf("Decimal: ");
    scanf("%d",&dec);
    while(dec!=0){
        rem=dec%8;
        oct[i]=rem;
        i++;
        dec=dec/8;
    }
    printf("Octal: ");
    for(j=i-1;j>=0;j--){
        printf("%d",oct[j]);
    }
}

//decimal to hexadecimal
void dec_hex(){
    int dec,rem,i=0,j,hex[100];
    //hexadecimal table
    int table[16]={48,49,50,51,52,53,54,55,56,57,65,66,67,68,69,70};
    printf("Decimal: ");
    scanf("%d",&dec);
    while(dec!=0){
        rem=dec%16;
        hex[i]=table[rem];
        i++;
        dec=dec/16;
    }
    printf("Hexadecimal: ");
    for(j=i-1;j>=0;j--){
        printf("%c",hex[j]);
    }
}


//binary to decimal
void bin_dec(){
    int bin,rem,dec=0,i=0;
    printf("Binary: ");
    scanf("%d",&bin);
    while(bin!=0){
        rem=bin%10;
        dec=dec+rem*pow(2,i);
        i++;
        bin=bin/10;
    }
    printf("Decimal: %d",dec);
}

//binary to hexadecimal
void bin_hex(){
    int bin,rem,dec=0,i=0,j=0,k,hex[100];
    //hexa table
    int table[16]={48,49,50,51,52,53,54,55,56,57,65,66,67,68,69,70};

    printf("Binary: ");
    scanf("%d",&bin);
    //bin to dec
    while(bin!=0){
        rem=bin%10;
        dec=dec+rem*pow(2,i);
        i++;
        bin=bin/10;
    }
    //dec to hexa
    while(dec!=0){
        rem=dec%16;
        hex[j]=table[rem];
        j++;
        dec=dec/16;
    }
    printf("Hexadecimal: ");
    for(k=j-1;k>=0;k--){
        printf("%c",hex[k]);
    }
}

//binary to octal
void bin_oct(){
    int bin,dec=0,rem,i=0,k,oct[100],j=0;
    printf("Binary: ");
    scanf("%d",&bin);
    //bin to dec
    while(bin!=0){
        rem=bin%10;
        dec=dec+rem*pow(2,i);
        i++;
        bin=bin/10;
    }
    //dec to bin
    while(dec!=0){
        rem=dec%8;
        oct[j]=rem;
        j++;
        dec=dec/8;
    }
    printf("Octal: ");
    for(k=j-1;k>=0;k--){
        printf("%d",oct[k]);
    }
}


//octal to decimal
void oct_dec(){
    int oct,rem,dec=0,i=0;
    printf("Octal: ");
    scanf("%d",&oct);
    while(oct!=0){
        rem=oct%10;
        dec=dec+rem*pow(8,i);
        i++;
        oct=oct/10;
    }
    printf("Decimal: %d",dec);
}

//octal to hexadecimal
void oct_hex(){
    int oct,dec=0,i=0,j=0,k,rem,hex[100];
    //hexadecimal table
    int table[16]={48,49,50,51,52,53,54,55,56,57,65,66,67,68,69,70};
    printf("Octal: ");
    scanf("%d",&oct);
    //oct to dec
    while(oct!=0){
        rem=oct%10;
        dec=dec+rem*pow(8,i);
        i++;
        oct=oct/10;
    }
    //dec to hex
    while(dec!=0){
        rem=dec%16;
        hex[j]=table[rem];
        j++;
        dec=dec/16;
    }
    printf("Hexadecimal: ");
    for(k=j-1;k>=0;k--){
        printf("%c",hex[k]);
    }
}

//octal to binary
void oct_bin(){
    int oct,rem,dec=0,i=0,j=0,k,bin[100];
    printf("Octal: ");
    scanf("%d",&oct);
    //oct to dec
    while(oct!=0){
        rem=oct%10;
        dec=dec+rem*pow(8,i);
        i++;
        oct=oct/10;
    }
    //dec to bin
    while(dec!=0){
        rem=dec%2;
        bin[j]=rem;
        j++;
        dec=dec/2;
    }
    printf("Binary: ");
    for(k=j-1;k>=0;k--){
        printf("%d",bin[k]);
    }
}


//hexadecimal to decimal
void hex_dec(){
    char c;
    int hex[100];
    int i=0,j,k,temp;
    //hexa table
    int table[16]={48,49,50,51,52,53,54,55,56,57,65,66,67,68,69,70};
    //hex input
    fflush(stdin);
    printf("Hexadecimal: ");
    while((c=getchar())!='\n'){
        hex[i]=c;
        i++;
    }
    //making input array coresponding to hexa table
    for(j=0;j<i;j++){
        temp=hex[j];
        for(k=0;k<16;k++){
            if(table[k]==temp){
                hex[j]=k;
                break;
            }
        }
    }
    //hexa to dec
    int dec=0,n=0;
    for(j=i-1;j>=0;j--){
        dec=dec+hex[j]*pow(16,n);
        n++;
    }
    //output
    printf("Decimal: %d",dec);
    }

//hexadecimal to binary
void hex_bin(){
    char c;
    int hex[100];
    int i=0,j,k,temp;
    //hexa table
    int table[16]={48,49,50,51,52,53,54,55,56,57,65,66,67,68,69,70};
    //hex input
    fflush(stdin);
    printf("Hexadecimal: ");
    while((c=getchar())!='\n'){
        hex[i]=c;
        i++;
    }
    //making input array coresponding to hexa table
    for(j=0;j<i;j++){
        temp=hex[j];
        for(k=0;k<16;k++){
            if(table[k]==temp){
                hex[j]=k;
                break;
            }
        }
    }
    //hexa to dec
    int dec=0,n=0;
    for(j=i-1;j>=0;j--){
        dec=dec+hex[j]*pow(16,n);
        n++;
    }

    //dec to bin
    int rem,bin[100],b=0;
    while(dec!=0){
        rem=dec%2;
        bin[b]=rem;
        b++;
        dec=dec/2;
    }
    //output
    printf("Binary: ");
    for(j=b-1;j>=0;j--){
        printf("%d",bin[j]);
    }
}

//hexadecimal to octal
void hex_oct(){
    char c;
    int hex[100],i=0,j,k,temp;
    int table[16]={48,49,50,51,52,53,54,55,56,57,65,66,67,68,69,70};

    fflush(stdin);
    //hexa input
    printf("Hexadecimal: ");
    while((c=getchar())!='\n'){
        hex[i]=c;
        i++;
    }
//converting to hexa table
    for(j=0;j<i;j++){
        temp=hex[j];
        for(k=0;k<16;k++){
            if(table[k]==temp){
                hex[j]=k;
                break;
            }
        }
    }
//hex to dec
    int dec=0,n=0;
    for(j=i-1;j>=0;j--){
        dec=dec+hex[j]*pow(16,n);
        n++;
}
//dec to oct
    int oct[100],o=0,rem;
    while(dec!=0){
        rem=dec%8;
        oct[o]=rem;
        o++;
        dec=dec/8;
    }
//output
    printf("Octal: ");
    for(j=o-1;j>=0;j--){
        printf("%d",oct[j]);
}
}