#include <stdio.h>

#define N 3  // Cambia N al tamaño de la matriz que desees

// Función para intercambiar dos filas en una matriz
void intercambiarFilas(int matriz[N][N], int fila1, int fila2) {
    for (int i = 0; i < N; i++) {
        int temp = matriz[fila1][i];
        matriz[fila1][i] = matriz[fila2][i];
        matriz[fila2][i] = temp;
    }
}

int main() {
    int matriz[N][N];

    // Inicializar la matriz (puedes cambiar los valores)
    for (int i = 0; i < N; i++) {
        for (int j = 0; j < N; j++) {
            matriz[i][j] = i * N + j + 1;
        }
    }

    // Imprimir la matriz antes del intercambio
    printf("Matriz antes del intercambio:\n");
    for (int i = 0; i < N; i++) {
        for (int j = 0; j < N; j++) {
            printf("%d\t", matriz[i][j]);
        }
        printf("\n");
    }

    int fila1, fila2;
    printf("Ingrese las filas que desea intercambiar (0 a %d): ", N - 1);
    scanf("%d %d", &fila1, &fila2);

    if (fila1 >= 0 && fila1 < N && fila2 >= 0 && fila2 < N) {
        intercambiarFilas(matriz, fila1, fila2);

        // Imprimir la matriz después del intercambio
        printf("Matriz después del intercambio:\n");
        for (int i = 0; i < N; i++) {
            for (int j = 0; j < N; j++) {
                printf("%d\t", matriz[i][j]);
            }
            printf("\n");
        }
    } else {
        printf("Índices de fila no válidos.\n");
    }

    return 0;
}
Asegúrate de cambiar el valor de N según las dimensiones de la matriz que deseas usar. Este código debería compilar y ejecutarse en Visual Studio sin problemas.

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#include <stdio.h>
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    scanf("%s", name);
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    return 0;
    
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About C

C language is one of the most popular general-purpose programming language developed by Dennis Ritchie at Bell laboratories for UNIX operating system. The initial release of C Language was in the year 1972. Most of the desktop operating systems are written in C Language.

Key features:

  • Structured Programming
  • Popular system programming language
  • UNIX, MySQL and Oracle are completely written in C.
  • Supports variety of platforms
  • Efficient and also handle low-level activities.
  • As fast as assembly language and hence used as system development language.

Syntax help

Loops

1. If-Else:

When ever you want to perform a set of operations based on a condition if-else is used.

if(conditional-expression) {
   // code
} else {
   // code
}

You can also use if-else for nested Ifs and if-else-if ladder when multiple conditions are to be performed on a single variable.

2. Switch:

Switch is an alternative to if-else-if ladder.

switch(conditional-expression) {    
case value1:    
 // code    
 break;  // optional  
case value2:    
 // code    
 break;  // optional  
...    
    
default:     
 // code to be executed when all the above cases are not matched;    
}

3. For:

For loop is used to iterate a set of statements based on a condition.

for(Initialization; Condition; Increment/decrement){  
  // code  
}

4. While:

While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.

while(condition) {  
 // code 
}

5. Do-While:

Do-while is also used to iterate a set of statements based on a condition. It is mostly used when you need to execute the statements atleast once.

do {
  // code 
} while (condition);

Arrays

Array is a collection of similar data which is stored in continuous memory addresses. Array values can be fetched using index. Index starts from 0 to size-1.

Syntax

One dimentional Array:

data-type array-name[size];

Two dimensional array:

data-type array-name[size][size];

Functions

Function is a sub-routine which contains set of statements. Usually functions are written when multiple calls are required to same set of statements which increases re-usuability and modularity.

Two types of functions are present in C

  1. Library Functions:

Library functions are the in-built functions which are declared in header files like printf(),scanf(),puts(),gets() etc.,

  1. User defined functions:

User defined functions are the ones which are written by the programmer based on the requirement.

How to declare a Function

return_type function_name(parameters);

How to call a Function

function_name (parameters)

How to define a Function

return_type function_name(parameters) {  
  //code
}